@peterthebike. Thanks for following up. Sorry for taking so long to respond. I had a crazy week.
Yes. That is the info I requested. Ok. So, I tested the module on my Windows Test server, but it works fine for me. I tested it on PHP versions 7.3.7 and 7.4.1, and didn’t encounter what you are experiencing.
How about your PHP error logs? Is there an error or warning or anything logged when you go into the module settings page? If so, please post it here so that I can see what is going on. If I can’t replicate the errors on my systems then it becomes more difficult to diagnose what you are experiencing. Hopefully there will be something in your error logs.
Oh, by the way, did you or anyone make any custom changes to the extension?