Unable to deal with unit: cm

URL of experiment: https://run.pavlovia.org/DirkHeeres/thesis-experiment/html

Description of the problem: I have been trying to get my experiment running on Pavlovia. However, I keep getting the error message below. I have changed all of the cm units in my experiment to different units, but the error keeps popping up. Anyone have any experience with this?
Kind regards

Unfortunately we encountered the following error:

when converting a length from stimulus unit to pixel units
unable to deal with unit: cm

Try to run the experiment again. If the error persists, contact the experiment designer.

cm won’t work on Pavlovia for the moment because it requires getting the physical monitor dimensions, which Pavlovia currently has no ability to do. See here: Consistent image size across screens