Problems with PHP 7.0 and SuiteCRM 7.5.3

When switching to PHP 7.0 on Ubuntu 16.04, I get this error:


PHP Fatal error:  Uncaught Error: Call to a member function getRelationshipObject() on null in /var/www/html/lbcrm/include/Dashlets/DashletGeneric.php

This error doesn’t appear when using PHP 5.6…same code base.

Any ideas?