KeyError running postProcessor tutorial example

[casparvv]

Running the example from the tutorial results in a key error for me when running the postProcessor after installing the repository with Poetry on Python 3.8.10.

The key interval can't be found, which gives an error in caseEvaluation.py at line 40.
Adding interval: 1 to the planner.yaml seems to fix the issue, I used 1 as found as a default value in the documentation.

[casparvv]

#28 adds the interval: 1 line to planner.yaml.

[maxspahn]

This problem is only present on main. In the next release this is solved.