Please, show the list of enabled apps you have.
There is a known problem with the richdouments app that will be eventually solved (Collabora Online on ownloud 10.5)
Go to the command-line and run occ app:list to know what apps are enabled and disabled. As far as I know, only the richdocuments app could trigger this behaviour.
Definitely your installation had a license at some point, and that license has expired. That’s why that message appears.
I don’t think ownCloud provides an easy way to remove the license, so I’d suggest to ignore the message.
If it bothers you, you’ll have to remove the license manually. There are 2 location to look for: the config.php file (in the “license-key” key) and the DB (oc_appconfig table -> enterprise_key appid -> license-key key)
Strange. I believe I did try the trial for enterprise a couple of years ago. I’ve never had this issue for any upgrades since then. I’m not sure why it is an issue now. I don’t have any license-key entries in my config.php but there are some references in my DB. I’m not sure how to get rid of them or which ones to get rid of.
Ok, Removing the 3 or 4 tables in the DB that had reference to Enterprise appears to have solved my problem. I was able to upgrade and no longer get the errors. Thanks for your help!