Upgrade to 3 - Everything was working, but now receiving 502 Bad Gateway!

root@Santiago:/media/585bedf6-f4cf-4d25-9927-4d3a3bba17c1# dpkg -l | grep openm
ii  openmediavault                                                   3.0.59                               all          Open network attached storage solution
ii  openmediavault-backup                                            3.3.5                                all          backup plugin for OpenMediaVault.
ii  openmediavault-flashmemory                                       3.4.3                                all          folder2ram plugin for OpenMediaVault
ii  openmediavault-keyring                                           1.0                                  all          GnuPG archive keys of the OpenMediaVault archive
ii  openmediavault-mysql                                             3.0.4                                all          MySQL plugin for OpenMediaVault.
ii  openmediavault-nginx                                             3.0.9                                all          Nginx plugin for OpenMediaVault.
ii  openmediavault-nut                                               3.2.7                                all          OpenMediaVault Network UPS Tools (NUT) plugin
ii  openmediavault-omvextrasorg                                      3.4.14                               all          OMV-Extras.org Package Repositories for OpenMediaVault
ii  openmediavault-plexmediaserver                                   3.7                                  all          OpenMediaVault Plex Media Server plugin
ii  openmediavault-resetperms                                        3.2                                  all          Reset Permissions
ii  openmediavault-sensors                                           3.0                                  all          Provides a cpu temperature monitor
ii  openmediavault-transmissionbt                                    3.0.9                                all          OpenMediaVault Transmission (BitTorrent client) plugin.
ii  openmediavault-urbackup-server                                   3.0                                  all          OpenMediaVault urbackup-server plugin

<phpfpm>
      <pools>
        <pool>
          <uuid>6f6fec40-5f56-4564-a9ea-ae7617405449</uuid>
          <name>cloud</name>
          <description>nextcloud</description>
          <user>www-data</user>
          <group>www-data</group>
          <pm_max_children>5</pm_max_children>
          <pm_start_servers>2</pm_start_servers>
          <pm_min_spare_servers>1</pm_min_spare_servers>
          <pm_max_spare_servers>3</pm_max_spare_servers>
          <pm_max_requests>0</pm_max_requests>
          <php_display_errors>0</php_display_errors>
          <php_html_errors>1</php_html_errors>
          <php_memory_limit>128</php_memory_limit>
          <php_max_execution_time>30</php_max_execution_time>
          <php_post_max_size>8</php_post_max_size>
          <php_upload_max_filesize>2</php_upload_max_filesize>
          <extra_options></extra_options>
        </pool>
      </pools>
    </phpfpm>

<nginx>
      <enable>1</enable>
      <server_names_hash_bucket_size>32</server_names_hash_bucket_size>
      <servers>
        <server>
          <uuid>0a4ae18b-f080-4023-b5cc-1e758789e055</uuid>
          <enable>1</enable>
          <sharedfolderref>c88f40c2-f38b-4932-b856-866bc1d115c2</sharedfolderref>
          <use_root>1</use_root>
          <use_public_directory>0</use_public_directory>
          <public_directory>public_html</public_directory>
          <host_type>port</host_type>
          <server_name></server_name>
          <port></port>
          <port_default_server>0</port_default_server>
          <ssl_enable>1</ssl_enable>
          <ssl_port>443</ssl_port>
          <ssl_port_default_server>0</ssl_port_default_server>
          <sslcertificateref>0aa086b2-b861-422e-8584-8338910a194f</sslcertificateref>
          <ssl_force>1</ssl_force>
          <php_enable>1</php_enable>
          <php_pool_ref>6f6fec40-5f56-4564-a9ea-ae7617405449</php_pool_ref>
          <php_use_default_config>1</php_use_default_config>
          <use_index>1</use_index>
          <use_index_html>0</use_index_html>
          <use_index_php>1</use_index_php>
          <autoindex>0</autoindex>
          <deny_htaccess>0</deny_htaccess>
          <log_enable>1</log_enable>
          <large_client_header_buffers>8</large_client_header_buffers>
          <extra_options>........