What was wrong with your configuration of the company? If got the same issue. I can't update my plugins after being behind the enterprise web proxy (aka Sophos Web Proxy)
In my Opinion it stuck at the moment they Download the .plg or the .txz file.
and here a part of the Logging after restart the Server
Jan 5 11:35:49 MKServer root: plugin: running: anonymous
Jan 5 11:35:49 MKServer root: plugin: skipping: /boot/config/plugins/community.applications/community.applications-2021.11.05-x86_64-1.txz already exists Jan 5 11:35:49 MKServer root: plugin: running: /boot/config/plugins/community.applications/community.applications-2021.11.05-x86_64-1.txz
Jan 5 11:35:49 MKServer root:
Jan 5 11:35:49 MKServer root: +==============================================================================
Jan 5 11:35:49 MKServer root: | Installing new package /boot/config/plugins/community.applications/community.applications-2021.11.05-x86_64-1.txz
Jan 5 11:35:49 MKServer root: +==============================================================================
Jan 5 11:35:49 MKServer root:
Jan 5 11:35:49 MKServer root: Verifying package community.applications-2021.11.05-x86_64-1.txz.
Jan 5 11:35:49 MKServer root: Unable to install /boot/config/plugins/community.applications/community.applications-2021.11.05-x86_64-1.txz: tar archive is corrupt (tar returned error code 2)
Jan 5 11:35:49 MKServer root: plugin: running: anonymous Jan 5 11:35:49 MKServer root: Creating Directories
Jan 5 11:35:49 MKServer root: Jan 5 11:35:49 MKServer root: Adjusting icon for unRaid version
Jan 5 11:35:49 MKServer root: Jan 5 11:35:49 MKServer root: ----------------------------------------------------
Jan 5 11:35:49 MKServer root: community.applications has been installed.
Jan 5 11:35:49 MKServer root: Copyright 2015-2021, Andrew Zawadzki
Jan 5 11:35:49 MKServer root: Version: 2021.11.05
Jan 5 11:35:49 MKServer root: ----------------------------------------------------
Jan 5 11:35:49 MKServer root:
Jan 5 11:35:49 MKServer root: plugin: community.applications.plg installed
Jan 5 11:35:49 MKServer root: Installing language packs
Jan 5 11:35:49 MKServer root: Starting go script
Jan 5 11:35:49 MKServer root: Starting emhttpd