I have finished building my visual search task experiment on the builder interface and I am now trying to upload it on pavlovia to run online. Now that I pressed the sync button I got this error:
File “/Applications/PsychoPy.app/Contents/Resources/lib/python3.6/psychopy/experiment/components/code/init.py”, line 231, in writeRoutineStartCodeJS
TypeError: str returned non-string (type NoneType)
and I do not know how to proceed or what exactly this errors means.