Online Random Dot Motion - dot stimuli?

Hi all,

A couple of years ago I developed a random dot motion task using dot stimuli in Psychopy. At the time, I tried to upload this task onto Pavlovia but it appeared that dot stimuli were not compatible with online testing. I was wondering if this is still the case?
I have tried to upload this experiment again and I still get this error:


I assume this means that dot stimuli are still not available online.
If this is the case, is there any other way to get this task online?

Thanks,
Claire