Suddenly cannot change/save course prices in learnpress

Suddenly and with no apparent reason learnpress stopped accepting my input in “course prices”. When I enter the course price under course settings the form clears when I hit update. I’ve tried updating plugins, deactivating plugins, entering new payment information, changing authors…and nothing. It will not let me enter a number in “course prices”. Any ideas?

The page I need help with: [log in to see the link]