Not sure what happened exactly... it was working fine and I didn't change anything in this file. It has to be related to something I did recently:
Ran a migration adding a unique constraint on a table
Generated two new entities of a couple very basic tables.
The handler I'm using isn't even using the new tables, so I don't know why this randomly broke. Anyone have any ideas? Or even some guidance on how to decipher that obscure error would be helpful.