Having the same issue
Please if someone could elaborate on this solution.
This is my solution right now but I'd imagine this will cause some other issues.
Currently I have the following commented out in scp/admin.php
require_once(INCLUDE_DIR.'class.pop3.php');
is now
//require_once(INCLUDE_DIR.'class.pop3.php');
This is working as I don't get a blank page now but I would prefer to fix this properly
I don't quite see how changing an email address in the setup would fix this.
I am quite confused any help or further explaination would be wonderful.