ContactManager_to_Yealink_AddressBook no longer able to pull contacts

[BrendanTCC]

ContactManager_to_Yealink_AddressBook/cm_to_yl_ab.php is no longer able to pull contacts from ContactManager as of FreePBX 17 with the way it's currently configured.

It's now triggering the below:

Whoops\Exception\ErrorException thrown with message "Undefined variable $username"

Stacktrace: #4 Whoops\Exception\ErrorException in /var/www/html/admin/libraries/gui_auth.php:21 #3 Whoops\Run:handleError in /var/www/html/admin/libraries/gui_auth.php:21 #2 require in /var/www/html/admin/bootstrap.php:275 #1 require_once in /etc/freepbx.conf:12 #0 require_once in /var/www/html/contacts/contacts_friends.php:49

To me it looks like something I'll need to chase up with Sangoma/the FreePBX community to poke at, and if I knew how the hell to fix this, I would, but figured I'd raise this for someone to poke at anyway.