Installing from master not possible gives an error during installation "result is not an object"

All parameters are working as suggested by the installation. I installed the vtigercrm/master branch... During the installation I get the error message "result is not an object".

I tried activating some debug output, couldn't find anything.

Might have to revert a few changes until it works again.

(Vtiger could really use some tests and a proper build pipe which includes an installation.)