Similar problem in that when submitting a form with a checkbox option, it triggers an error message that the checkbox item was not completed… Since the form does not submit, nothing saves. It doesn’t give the option to actually try again on its own.
Hitting the back button takes users back to the completed form, where the checkbox is still checked, and trying again, same errror.
Failed on 3.1. Rolled back to 3.09 still failed.
Saw on here someone recommend 3.04, tried that and it worked. (didn’t have time to keep going back one at a time).
WP 6.0 running with PHP 7.4
Not positive but the same site generates a critical error when I upgrade to php 8.0. That might be this plugin too, might be something else.
I normally work exclusively with GF. This plugin was installed by a previous developer. I’m not knocking it, but only maintained it on this site for about 3 years as compared to 14 years of doing lots of things with GF.
Having very good competition between at least a couple plugins, if not more is often good for everyone.