hey mate thats big work for something so simple. you have login details already to our site or no? if you do just login and fix it asap please if you are still waiting for login details let me know how i can send to you
I have checked your website, activated the plugin and registered a test account and everything is working fine. But as you are using V3, the are so many factor to be false positive in this version. Also if there any false positive there is no user option to prove that he/she is a human.
I suggest you change captcha version to “V2 checkbox” and change google keys as well. Then test.