Social Importer Not Working

I have been running into this problem for many weeks.
Attempting to do an import as a guest always results in this error message popping up:

For a while I was getting this error with the WooCommerce PayPal Gateway turned on, but deactivating that fixed it. Now it’s not working even with that and EVERY other plugin disabled except for core GeoDirectory and Social Importer.

It’s not working for Add Club:
https://corncenstaging.wpengine.com/add-listing/?listing_type=gd_club

But does work for Add Event:
https://corncenstaging.wpengine.com/add-listing/?listing_type=gd_event

I will share WP admin info in a private message to follow.