Plugin all of the sudden breaks site

I was enjoying life setting up a blocktheme (WP 6.9) with Blockera (1.12.2) and it looked great. But… all of the sudden, I recieved a “There has been a critical error on this website.” error. Admin page works normally, except for the site editor (Appearance>Editor). That’s giving me a “You attempted to edit an item that doesn’t exist. Perhaps it was deleted?” message.

When I disable the plugin, everything returns to their non responsive mess, but at least I can access it. Please help, I miss Blockera.

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