ERROR for site owner: Invalid key type

Ran into the same issue. I thought it was working fine until I used another computer. I’m trying to figure this out. If I find out something I was post what I find in here.

OK I found an answer. This plugin does not use ReCaptcha v3. It only uses v2.(It would be nice if that was clearly stated on the plugin description page) You will need to log into your google account and set recaptcha to version 2. This sucks. I will probably write my own plugin to handle v3 because for some reason a lot of these plugins look abandoned even though it appears they are being updated. Who is updating them? What are they being updated with? Mysteries…Anyway, hope this helps you get your issue sorted out.