500: Internal Server Error - User::checkPasswordStrength(): Argument #1 ($password) must be of type string, null given, called in C:\inetpub\wwwroot\limesurvey\application\controllers\admin\Authentication.php on line 239After you put in your new password.

Also has anyone got a URL to the older downloads?
I can't find 6.8.1 anywhere.

Thanks

Gone back to limesurvey6.8.1+241120.zip and now works fine.

Please create a bug report. No bug report - no fix.