May i know what error you are getting?
Did you changed google keys for v3?
Can you share your form page url?

(This plugin does not even offer any additional feature in PRO version, this money is for the time i spend behind this plugin. why you even purchase this?)
(I already informed my billing department to refund you. You will get your refund in couple of days. As this is an emergency situation here, refund may delay couple of days, but you will get it, don’t worry)