System not working after apt upgrade

hmm doesn’t help me move forward ; I feel like someone on your team has thoughtfully gone through this process

I’ve seen several instances of mentioning restore but can’t wrap my head around how to go about doing this in a newbie friendly step.
Most of my searches on how to restore speak about a .bak file ; and all I have to play with is in my /mnt/dietpi_userdata/nextcloud_data which has a dietpi-nextcloud-database-backup.sql . I think restoration of this somehow might bring things back because I can’t recreate the second user with the Nextcloud web page nor through the terminal “Username is invalid because files already exist for this user”

Outstanding questions

  1. restoration of calendar/contacts for admin
  2. creation of the 2nd user so that I can file ncc files:scan --all and then restore their calendar/contacts

Everything else works out of the box, atleast for admin. I installed Joplin, Carnet and since they reference the ‘files’ folder for admin user it just synced up perfectly.