[Flow] No Parameters are recognized via Post after Update to Flow 2.0

[David Sporer]

Hi,

I know it's really late but I started migration one of my projects from
FLOW3 1.1 to Flow 2.0.
Everything seems to be working so far except that if I send a form the post
parameters don't seem to be recognized.
No matter what form it always says that required parameters are missing.

Do you know this error or have an idea what to check?

Best Regards
David