Error message when pressing space bar

URL of experiment:

Description of the problem:
I am encountering this error message when trying to pilot my experiment: Unfortunately we encountered the following error:

"* TypeError: Cannot assign to read only property ‘undefined’ of object '#'

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

The experiment instructions comes up and when pressing the space bar to continue this message occurs. I am new to PsychoPy/Pavlovia and have no idea what is wrong here. The experiment is programmed in builder and works fine on my computer.
Any help would be much appreciated.

@Anette I think this error is because you have empty columns in your conditions file.

Thank you @dvbridges for your fast reply!
I’ll see if deleting the columns will make it work.
Kind regards