Home assistant not working since upgrade

Some options I would try:

  1. Restore the system from a know backup prior to the upgrade

  2. Use the CLI to perform some addition checks and rebuilds (Home Assistant Command Line)

ha su repair
ha core rebuild
ha host reboot
  1. Boot in Safe Mode to see if the problem persists - If ‘no’ then it is probably a misbehaving integration (see tracking down misbehaving integrations); if ‘yes’ its a problem with OS or Supervisor and should be reported on GitHub.