AFM Getting Started - Parse Error on Activation

Hello everybody,

I followed the getting started tutorial for the Application Function Modeler here: SAP HANA Academy - AFM: 9. Getting Started with the Application Function Modeler - Part 2 [SPS 09] - YouTube

Unfortunately when I try to activate my flowgraph I get the following errors:

Message :

    Activation ID: 7011 (Repository: Activation failed for at least one object;At least one error was encountered during activation. Please see the CheckResult information for  detailed information about the root cause. No objects have been activated.)

I also tried it with a matching table as a Data Sink instead of a Data Sink (Template Table). But this didn't help.

The validation seems to be successful, just the activation fails.

I would really appreciate your help!