OnlyOffice not workig after upgrade of Nextcloud to 16.0.4

Hello,

I did an upgrade of Nextcloud to version 16.0.4. After the update my OnlyOffice installation is not reachable anymore.
When I set the path to the onlyoffice ds in nextcloud I get the following error message:

Fehler beim Anschließen (Client error:GET https://[REMOVED]/onlyoffice-documentserver/healthcheckresulted in a404 Not Foundresponse: <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <html><head> <title>404 Not Found</title> </head><body> <h1>Not Found (truncated...) )

When I look in the status of the OnlyOffice DS in the web appcenter it shows not running. I tried to uninstall OnlyOffice DS and got the folowing message:
Ein Fehler ist aufgetreten: No container found. Unable to run store_data!
The appcenter.log showed following message:

 19846 actions.remove                   19-09-09 10:05:06 [    INFO]: Going to remove ONLYOFFICE Document Server (5.3.0.243)
 19846 actions.remove                   19-09-09 10:05:06 [   DEBUG]: Calling prescript (prerm)
 19846 actions.remove                   19-09-09 10:05:06 [   DEBUG]: /var/cache/univention-appcenter/appcenter.software-univention.de/4.4/onlyoffice-ds_20190530103938.prerm does not exist
 19846 packages                         19-09-09 10:05:06 [   DEBUG]: Holding LOCK
 19846 actions.remove                   19-09-09 10:05:06 [    INFO]: No hostdn for onlyoffice-ds found. Nothing to remove
 19846 actions.remove.progress          19-09-09 10:05:06 [   DEBUG]: 5
 19846 actions.remove.progress          19-09-09 10:05:06 [   DEBUG]: 5
 19846 actions.configure                19-09-09 10:05:06 [   DEBUG]: Calling configure
 19846 actions.configure.progress       19-09-09 10:05:06 [   DEBUG]: 0
 19846 actions.configure                19-09-09 10:05:06 [    INFO]: Configuring onlyoffice-ds=5.3.0.243
 19846 actions.configure                19-09-09 10:05:06 [   DEBUG]: /var/cache/univention-appcenter/appcenter.software-univention.de/4.4/onlyoffice-ds_20190530103938.configure_host does not exist
 19846 actions.configure.progress       19-09-09 10:05:06 [   DEBUG]: 100
 19846 actions.remove                   19-09-09 10:05:06 [CRITICAL]: No container found. Unable to run store_data!
 19846 actions.stop                     19-09-09 10:05:06 [   DEBUG]: Calling stop
 19846 actions.stop.progress            19-09-09 10:05:06 [   DEBUG]: 0
 19846 actions.stop                     19-09-09 10:05:06 [CRITICAL]: onlyoffice-ds is not supported
 19846 actions.stop.progress            19-09-09 10:05:06 [   DEBUG]: 100
 19846 actions.remove.progress          19-09-09 10:05:06 [   DEBUG]: 45
 19846 actions.remove                   19-09-09 10:05:06 [   DEBUG]: Calling /etc/init.d/apache2 reload
 19846 actions.remove                   19-09-09 10:05:06 [    INFO]: Reloading apache2 configuration (via systemctl): apache2.service.
 19846 actions.remove                   19-09-09 10:05:07 [   DEBUG]: /etc/init.d/apache2 returned with 0
 19846 actions.remove.progress          19-09-09 10:05:07 [   DEBUG]: 55
 19846 actions.remove.progress          19-09-09 10:05:07 [   DEBUG]: 60
 19846 actions.remove.progress          19-09-09 10:05:07 [   DEBUG]: 70
 19846 actions.remove.progress          19-09-09 10:05:07 [   DEBUG]: 80

Is there a command to start OnlyOffice DS manually? Something like univention-app start onlyoffice-ds (-> gave me onlyoffice not supported)?
How can I remove and reinstall OnlyOffice manually? univention-app remove onlyoffice-ds did not work either and gave me:

Going to remove ONLYOFFICE Document Server (5.3.0.243)
No hostdn for onlyoffice-ds found. Nothing to remove
Configuring onlyoffice-ds=5.3.0.243
No container found. Unable to run store_data!
onlyoffice-ds is not supported

kind regards,
Sascha

Just wanted to let you know I also receive the same error after a recent upgrade of nextcloud and the onlyoffice plugins. Have tried running joinscripts manually for both apps and tried uninstalling the onlyoffice-ds and received the same errors. Have not had a chance to look into how to manually uninstall and reinstall yet.

uninstalling with univention-app remove onlyoffice-ds --do-not-backup and then deleting the /var/lib/univention-appcenter/apps/onlyoffice-ds directory and reinstalling has got it working again for me.