Yes, we are also experiencing the joys of this bug in our org which impacts the main workflow for our users. Instead of using the /generate endpoint that results in a bad response I switched over the add data widget to batch send to /geocode. I then wired in a csv column parser and selector for users to select the field needed from their csv.
As it's mainly contained within /add-data-popper/data-file-upload.tsx in the add data widget it's relatively straightforward to update with a bit of trial and error. You'll need to clone the add data widget first, or hope that this bug is fixed.
