PHP7.2 Error on FreeBSD

[jkatiku]

I have managed to install exim4u on FreeBSD11 with Apache24, MYSQL8.0, PHP72. am able to login to the usermanager and successfully check mail.

However when trying to edit or create users with the User Manager, i keep getting this error. is there something am missing

[07-Nov-2018 17:53:58 UTC] PHP Notice: Undefined index: username in /usr/local/www/apache24/data/exim4u/config/functions.php on line 37

_**> "if (strtolower($candidate) <> strtolower($_POST['localpart'])

            && strtolower($candidate) <> strtolower($_POST['username'])"**_

[07-Nov-2018 17:53:58 UTC] PHP Notice: Undefined variable: salt in /usr/local/www/apache24/data/exim4u/adminuseraddsubmit.php on line 162

_> " ':crypt'=>crypt_password($POST['clear'],$salt),"