[Error Message] You need to enter a valid email address

[BumbleBee]

I'm after starting a fresh install and when I try to register I'm getting this error message every now and then: "You need to enter a valid email address"

Sometimes the email works first time, but then when I go back and re-type it exactly this error can come up, I've tried this in Firefox, Chrome and Edge and all have the same issue. There is also a case where sometimes the error won't show up but the box will turn red, until I click into it and off it again then the error message appears.

I can provide the link if it is needed or helps.

Any ideas what could be causing this?
Thanks!

[noyle]

A URL to your forum would be helpful to figure out if it's an authorization code mismatch issue. Or you could try to inspect from the network tab in browser's developer tools for xmlhttp.php's response when the "red box" or "You need to enter a valid email address" occurs.

[BumbleBee]

Yes it was an authorization code mismatch issue.

I tried these steps: https://community.mybb.com/thread-218862.html but the changes were already there. I was using Cloudflare so I've enabled "Scrutinize User's IP address" and it seems to all working now.

Thanks for your help!