Sonarr cant access files downloaded with nzbget

Hello,

i just installed sonarr and nzbget on my openmediavault. while basically everything is running smoothly (sonarr find a release, passes it to nzbget to download, i can see the progress in sonarr) i cant get sonarr to post process the downloaded files. the sonarr log gives me the following error on all downloads;

Couldn't import episode /media/de937753-606c-47b5-baf6-01180272c777/nzbget/completed/Series/whatever.mkv: Access to the path is denied.

the directory of nzb gives me this with ls -lha:

drwxrwxrwx  5 nzbget users 4.0K Feb 24 18:40 completed

the downloaded files are the same but miss the x attribute.

how can i set things up, that sonarr is able to rename the downloaded files and move them to the correct folder for the media library?

i just moved my NZB root folder out of my mergerfs pool onto an seperate disk hoping it would help, sadly no change
the permissions for the folders are as follows:

drwxr-xr-x  5 root root 4.0K Feb 25 17:33 ec1ad727-677c-4161-9d10-f331060bb9e6
drwxrwsr-x  8 root   users 4.0K Feb 25 18:06 nzbget
drwxr-sr-x 4 nzbget users 4.0K Feb 25 18:16 completed

i did not change any permission, the flags are all as they where set up by the plugin installation

wonder why the permission changed.
i just moved the folder to a different drive with mv.

i chmodded the completed dir, but it did not really help.

the downloaded files still have just the r attribute for group and other.
i guess that is what the umask is for.
sadly i could not figure out how to set it.
i just found out that in need to specify it in the ~/.bashrc file.
that file was not present in /home/nzbget so i just created one containing nothing more then:

umask 0000

and rebooted.
sadly that did not change anything.
new files are still created without write access.