Cannot Update Products in Admin – JS Error

Suddenly when I go to update a product–any product–clicking the Update button generates the following error in Chrome’s console:

An invalid form control with name=’wcpoa_attachment_name[]’ is not focusable.

I have found that this is because the input in the hidden clone row at the bottom of the attachments table is not being disabled. Something is preventing the repeater initialize function in wcpoa-input.js from executing (that’s the code that disables the clone row inputs on page load).

This minified/compiled JS is way too obnoxious for me to debug any further. Other functionality like adding and removing rows seems to work fine.