NOTE: This is a very edge case with a simple workaround.

If the WordPress database table uses prefix is give_ the All Forms list fails to load (Donations -> All forms).

The workaround is to change the database table prefix.

This plugin allows you to do that very easily from the WP admin: https://wordpress.org/plugins/brozzme-db-prefix-change/

As always, BACK UP! before doing any procedure that deals with your database.