After updating your Authelia to v4.33.1, You'll probably see an error "Can't continue due to the errors loading the configuration"
To solve the issue, edit the configuration yaml file, and add a new encryption_key key under storage.
storage:
local:
path: /config/db.sqlite3 #this is your databse. You could use a mysql database if you wanted, but we're going to use this one.
encryption_key: you_must_generate_a_random_string_of_more_than_twenty_chars_and_configure_this
Hope this helps