Endpoint Manager Basefile Edit Error Yealink

Commercial Modules
1

Editing basefiles for Yealink T38G.
FreePBX 13.

When hitting save and rebuild configs I get:

Whoops\Exception\ErrorException
Undefined index: line0Ext
File:/drbd/httpd/www/html/admin/modules/endpoint/functions.inc/functions_yealink.php:267