Triggering Manual Steps doesn't work in combination with cloudbees-folder

We already had a Build Pipeline overview of existing jobs with downstream triggers.

Afterwards, the Folder plugin was installed and all relevant jobs were moved to the newly created folder.

Jobs which use the normal Trigger Parametrized build on other project work, but then it's broken for jobs using the Build Other Project (Manual Step).

When looking at the Build Pipeline view, triggering the Manual Job results in a progressbar running, but then turns back to the state of a job which hasn't been run before (at this point a stack trace with exceptions is being thrown)