Hello Daniel.

Issues like this usually occur when there's something wrong with that table in the database, or if you applied some settings to deleted columns. Another thing could be a conflict with another plugin, but I cannot say for sure until I inspect the table.

Please provide me a temporary WP-admin login for your site where this happens, so we could log in and take a look ‘from the inside’ as that’s the most efficient way to see and resolve the issue. We do not interfere with any data or anything else except for the plugin (in case that’s a production version of the site), and of course we do not provide login data to third party. You can write credentials here just check Private Reply so nobody can see them except us.