To fix the error enter a valid email address to register:
First open up Register.php (which should be in the root directory of your 4 Images Gallery) use either your cpanel or notepad to make this change (it won’t work otherwise).
Search for the line:
if ($captcha_enable_registration && !captcha_validate($captcha))
see the below image to see what needs to be changed.
If you have any questions please leave them in comments always remember keep a copy before you make any changes so that you can always fix it if you make the wrong change.
