I implemented my process in in the main sequence with a lot of subsequences. Then I tried to invoke new activities with a flowchart and since then, the main workflow can not be executed anymore and I get the error "Object reference not set to instance of an object.
I have been trying to find the error for hours now and also deleted the new flowcharts, but I still get the error.
Unfortunately, I am not allowed to post my process flow.
Does anybody have experience with this or knows, which variables I should check?