CLI error message

~$ sudo apt-get update
Get:1 file:/var/cache/openmediavault/archives  InRelease
Ign:1 file:/var/cache/openmediavault/archives  InRelease
Get:2 file:/var/cache/openmediavault/archives  Release
Ign:2 file:/var/cache/openmediavault/archives  Release
Get:3 file:/var/cache/openmediavault/archives  Packages                                  
Ign:3 file:/var/cache/openmediavault/archives  Packages                                  
Get:4 file:/var/cache/openmediavault/archives  Translation-en                                                              
Ign:4 file:/var/cache/openmediavault/archives  Translation-en                                                              
Get:3 file:/var/cache/openmediavault/archives  Packages                                                                                            
Ign:3 file:/var/cache/openmediavault/archives  Packages                                                                                            
Get:4 file:/var/cache/openmediavault/archives  Translation-en                                                                                      
Ign:4 file:/var/cache/openmediavault/archives  Translation-en                                                                                      
Get:3 file:/var/cache/openmediavault/archives  Packages                                                                                            
Ign:3 file:/var/cache/openmediavault/archives  Packages                                                                                            
Get:4 file:/var/cache/openmediavault/archives  Translation-en                                                                                      
Ign:4 file:/var/cache/openmediavault/archives  Translation-en                                                                                      
Get:3 file:/var/cache/openmediavault/archives  Packages                                                                                            
Ign:3 file:/var/cache/openmediavault/archives  Packages                                                                                            
Get:4 file:/var/cache/openmediavault/archives  Translation-en                                                                                      
Ign:4 file:/var/cache/openmediavault/archives  Translation-en                                                                                      
Get:3 file:/var/cache/openmediavault/archives  Packages                                                                                            
Ign:3 file:/var/cache/openmediavault/archives  Packages                                                                                            
Get:4 file:/var/cache/openmediavault/archives  Translation-en                                                                                      
Ign:4 file:/var/cache/openmediavault/archives  Translation-en                                                                                      
Get:3 file:/var/cache/openmediavault/archives  Packages                                                                                            
Get:4 file:/var/cache/openmediavault/archives  Translation-en                                                                                      
Ign:4 file:/var/cache/openmediavault/archives  Translation-en                                                                                      
Ign:5 https://downloads.plex.tv/repo/deb ./public InRelease                                                                                        
Ign:6 https://downloads.plex.tv/repo/deb ./public Release                                                                                          
Ign:7 https://download.docker.com/linux/debian stretch InRelease                                                                                   
Hit:8 http://security.debian.org/debian-security stretch/updates InRelease                                                                         
Ign:9 https://downloads.plex.tv/repo/deb ./public/main amd64 Packages                                                                           
Ign:10 https://download.docker.com/linux/debian stretch Release                                  
Hit:11 http://packages.openmediavault.org/public arrakis InRelease                               
Ign:12 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch InRelease              
Ign:13 https://openmediavault.github.io/packages arrakis InRelease                                    
Ign:14 https://downloads.plex.tv/repo/deb ./public/main all Packages                                  
Ign:15 https://download.docker.com/linux/debian stretch/stable all Packages                           
Ign:16 http://ftp.de.debian.org/debian stretch InRelease                                              
Ign:17 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch InRelease         
Ign:18 https://downloads.plex.tv/repo/deb ./public/main Translation-en          
Ign:19 https://download.docker.com/linux/debian stretch/stable amd64 Packages                         
Ign:20 https://openmediavault.github.io/packages arrakis Release                                      
Ign:9 https://downloads.plex.tv/repo/deb ./public/main amd64 Packages                                 
Ign:21 https://download.docker.com/linux/debian stretch/stable Translation-en                         
Ign:22 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch InRelease       
Hit:23 http://ftp.de.debian.org/debian stretch-updates InRelease                                      
Ign:24 https://openmediavault.github.io/packages arrakis/main amd64 Packages                          
Ign:14 https://downloads.plex.tv/repo/deb ./public/main all Packages            
Ign:15 https://download.docker.com/linux/debian stretch/stable all Packages                           
Ign:25 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch Release                
Ign:18 https://downloads.plex.tv/repo/deb ./public/main Translation-en                                
Ign:19 https://download.docker.com/linux/debian stretch/stable amd64 Packages
Ign:26 https://openmediavault.github.io/packages arrakis/main all Packages
Hit:27 http://ftp.de.debian.org/debian stretch Release                   
Ign:9 https://downloads.plex.tv/repo/deb ./public/main amd64 Packages    
Ign:21 https://download.docker.com/linux/debian stretch/stable Translation-en
Ign:28 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch Release
Ign:29 https://openmediavault.github.io/packages arrakis/main Translation-en
Ign:14 https://downloads.plex.tv/repo/deb ./public/main all Packages
Ign:15 https://download.docker.com/linux/debian stretch/stable all Packages
Ign:30 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch Release
Ign:24 https://openmediavault.github.io/packages arrakis/main amd64 Packages
Ign:18 https://downloads.plex.tv/repo/deb ./public/main Translation-en
Ign:19 https://download.docker.com/linux/debian stretch/stable amd64 Packages
Ign:31 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main amd64 Packages
Ign:26 https://openmediavault.github.io/packages arrakis/main all Packages
Ign:9 https://downloads.plex.tv/repo/deb ./public/main amd64 Packages
Ign:21 https://download.docker.com/linux/debian stretch/stable Translation-en
Ign:32 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main all Packages
Ign:14 https://downloads.plex.tv/repo/deb ./public/main all Packages
Ign:15 https://download.docker.com/linux/debian stretch/stable all Packages
Ign:29 https://openmediavault.github.io/packages arrakis/main Translation-en
Ign:34 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main Translation-en
Ign:18 https://downloads.plex.tv/repo/deb ./public/main Translation-en
Ign:19 https://download.docker.com/linux/debian stretch/stable amd64 Packages
Ign:24 https://openmediavault.github.io/packages arrakis/main amd64 Packages
Ign:21 https://download.docker.com/linux/debian stretch/stable Translation-en
Ign:9 https://downloads.plex.tv/repo/deb ./public/main amd64 Packages   
Ign:35 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main all Packages
Ign:26 https://openmediavault.github.io/packages arrakis/main all Packages                
Ign:14 https://downloads.plex.tv/repo/deb ./public/main all Packages                      
Ign:15 https://download.docker.com/linux/debian stretch/stable all Packages               
Ign:36 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main amd64 Packages
Ign:29 https://openmediavault.github.io/packages arrakis/main Translation-en              
Ign:18 https://downloads.plex.tv/repo/deb ./public/main Translation-en
Ign:19 https://download.docker.com/linux/debian stretch/stable amd64 Packages
Hit:33 http://cdn-fastly.deb.debian.org/debian stretch-backports InRelease
Ign:37 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main Translation-en
Ign:21 https://download.docker.com/linux/debian stretch/stable Translation-en
Err:9 https://downloads.plex.tv/repo/deb ./public/main amd64 Packages
  
Ign:24 https://openmediavault.github.io/packages arrakis/main amd64 Packages
Ign:38 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main amd64 Packages
Ign:14 https://downloads.plex.tv/repo/deb ./public/main all Packages
Ign:15 https://download.docker.com/linux/debian stretch/stable all Packages
Ign:26 https://openmediavault.github.io/packages arrakis/main all Packages
Ign:39 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main all Packages
Ign:18 https://downloads.plex.tv/repo/deb ./public/main Translation-en
Err:19 https://download.docker.com/linux/debian stretch/stable amd64 Packages
  
Ign:29 https://openmediavault.github.io/packages arrakis/main Translation-en
Ign:40 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main Translation-en
Ign:21 https://download.docker.com/linux/debian stretch/stable Translation-en
Ign:24 https://openmediavault.github.io/packages arrakis/main amd64 Packages
Ign:31 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main amd64 Packages
Ign:26 https://openmediavault.github.io/packages arrakis/main all Packages
Ign:32 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main all Packages
Ign:29 https://openmediavault.github.io/packages arrakis/main Translation-en
Ign:34 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main Translation-en
Ign:35 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main all Packages
Err:24 https://openmediavault.github.io/packages arrakis/main amd64 Packages
  
Ign:36 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main amd64 Packages
Ign:26 https://openmediavault.github.io/packages arrakis/main all Packages
Ign:37 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main Translation-en
Ign:29 https://openmediavault.github.io/packages arrakis/main Translation-en
Ign:38 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main amd64 Packages
Ign:39 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main all Packages
Ign:40 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main Translation-en
Ign:31 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main amd64 Packages
Ign:32 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main all Packages
Ign:34 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main Translation-en
Ign:35 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main all Packages
Ign:36 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main amd64 Packages
Ign:37 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main Translation-en
Ign:38 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main amd64 Packages
Ign:39 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main all Packages
Ign:40 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main Translation-en
Ign:31 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main amd64 Packages
Ign:32 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main all Packages
Ign:34 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main Translation-en
Ign:35 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main all Packages
Ign:36 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main amd64 Packages
Ign:37 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main Translation-en
Ign:38 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main amd64 Packages
Ign:39 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main all Packages
Ign:40 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main Translation-en
Ign:31 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main amd64 Packages
Ign:32 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main all Packages
Ign:34 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main Translation-en
Ign:35 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main all Packages
Ign:36 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main amd64 Packages
Ign:37 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main Translation-en
Ign:38 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main amd64 Packages
Ign:39 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main all Packages
Ign:40 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main Translation-en
Err:31 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main amd64 Packages
  
Ign:32 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main all Packages
Ign:34 https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch/main Translation-en
Ign:35 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main all Packages
Err:36 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main amd64 Packages
  
Ign:37 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch/main Translation-en
Err:38 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main amd64 Packages
  
Ign:39 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main all Packages
Ign:40 https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch/main Translation-en
Reading package lists... Done
W: The repository 'https://downloads.plex.tv/repo/deb ./public Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: The repository 'https://download.docker.com/linux/debian stretch Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: The repository 'https://openmediavault.github.io/packages arrakis Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: The repository 'https://dl.bintray.com/openmediavault-plugin-developers/arrakis stretch Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: The repository 'https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex stretch Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: The repository 'https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker stretch Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch https://downloads.plex.tv/repo/deb/dists/./public/main/binary-amd64/Packages  
E: Failed to fetch https://download.docker.com/linux/debian/dists/stretch/stable/binary-amd64/Packages  
E: Failed to fetch https://openmediavault.github.io/packages/dists/arrakis/main/binary-amd64/Packages  
E: Failed to fetch https://dl.bintray.com/openmediavault-plugin-developers/arrakis/dists/stretch/main/binary-amd64/Packages  
E: Failed to fetch https://dl.bintray.com/openmediavault-plugin-developers/arrakis-plex/dists/stretch/main/binary-amd64/Packages  
E: Failed to fetch https://dl.bintray.com/openmediavault-plugin-developers/arrakis-docker/dists/stretch/main/binary-amd64/Packages  
E: Some index files failed to download. They have been ignored, or old ones used instead.