CPT Options Pages ver 2.0.8. Options pages are blank

I just upgraded Advanced Custom Fields : CPT Options Pages plugin to version 2.0.8 and when I do that and go into the options for a particular custom post archive the options page UI is blank other than the publish->update button. I had to roll back to version 2.0.7 to get it to work again. It seemed to be working on the front end, it was only in the wordpress back office options page that is blank and not working properly. I have WordPress version 5.8.1 installed.