Installed this on two different servers, received no error messages during the installation either time. Tried three different browsers but the popup login form won't submit - the button is unresponsive. When I try to create a new account, the email field is outlined in red like there's an error, and the form is unresponsive.

I'm using current browser versions, PHP 7.3, and MySQL. If this is my first interaction with the script, no need to poke at it further, I'm done. Money flushed down the toilet, I will now move on to find something that actually works.