Workflow - Contracts Services - Issue

[rslemer]

I tried created a new workflow to assigned relation records of Contract Services

I wish move contacts, opportunities, documents and other, to same Assigned to Contracts Services.

But system shows :

Fatal error: Call to a member function getTableName() on null in /usr/share/coreBOS/corebos-master/include/QueryGenerator/QueryGenerator.php on line 711

I reproduced in demo on line too ...