Of course I have checked the log file, that’s where my errors are coming from.
2022-03-01T14:29:07.140332865Z Configuring Redis as session handler
2022-03-01T14:29:11.062598847Z Can't start Nextcloud because the version of the data (23.0.2.1) is higher than the docker image version (21.0.9.1) and downgrading is not supported. Are you sure you have pulled the newest image version?
There is more log entries, all of which are just rehashes of this exact message.
This looks very interesting, I will try that, thank you.
And as for the confusion about upgrading to the latest minor version: There is multiple sources, including in this forum that tell you to upgrade to the latest minor version first. So that is what I did. There is no need to get aggressive, I am just trying every possibility I can think of, because I haven’t seen any results so far.