Captcha 4WP not working

I purchased this Captcha 4WP premium yesterday, Jan 22, 2022

I have followed, repeatedly, all of your instructions and can not get this plug-in to work. My pages keep referring me back to Invalid Key Type.

When I went to disable the plug-in I am told that I can only unsubscribe and that my access to the plug-in will end. Plus it tells me that I am stuck ??? using this plug-in until the subscription runs out in one year.

Am I trapped with this problem for a full year, and am I stuck having paid for something that doesn’t work?

The page I need help with: [log in to see the link]