I made it!
I run apt upgrade from terminal.
Then in webadmin the system upgrade just showed that some more debian apps and services needed to be upgraded. Did that.
Then checked with
$ lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux 11 (bullseye)
Release: 11
Codename: bullseye
You must continue the migrations…
Try this: sudo apt update && sudo apt upgrade --fix-missing sudo yunohost tools migrations run 0021_migrate_to_bullseye --skip
and sudo yunohost tools migrations list --pending
then sudo yunohost tools migrations run --accept-disclaimer
Perhaps you will also need some help for the migration from Postgresql 11 to 13…
Thanks @rodinux .
I tried all the commands above and they all said that there was nothing to do!
I only run
sudo apt autoremove
to remove a long list of packages.
The webadmin told me after the second System Upgrade that all Yunohost packages were being updated next in the background and the server would be down for some time. Which it did and then returned with the login screen.page.
So, I think your commands were taken care off by the webadmin page … see post above yours which states that all has been done:
Previous migrations
Collapse
Repair Python app after bullseye migration
Migrate databases from PostgreSQL 11 to 13
Migrate php7.3-fpm ‘pool’ conf files to php7.4
Upgrade the system to Debian Bullseye and YunoHost 11.x
To close this issue here is the diagnostic output from webadmin: