AppWrite instance suddenly stopped working & and upgrade to 1.6.0 fails (self hosted)

I cannot access my databases anymore or functions or anything else. I did not do anything and the instance just stopped working.

I tried to solve it with an upgrade from 1.5.10 to 1.6.0 but this error shows up:

@AleXoTroN https://discord.com/channels/564160730845151244/1312719002514227220