Psychopy won't synchronize to pavlovia

I have been trying to get 5 (separate) tasks of an experiment to run online in Pavlovia, but I’ve not had any luck. All the tasks run perfectely fine in Psychopy, but whenever I try to synchronize them to Pavlovia the Psychopy app crashes. This first happened when I was working in an old version of Psychopy so I rebuild all the tasks in the newest version of Psychopy but I’m still running in to the same problems. Everytime I try to get one of the tasks to sync to Pavlovia, Psychopy stops working.
The tasks are quite simple with some sliders, some pictures and videos.
Does anyone have any idea how to fix this problem? All help is much appreciated!