Experiment not working on Pavlovia: variable is not iterable (cannot read property undefined)

[wakecarter]

Now it runs and gives the error

{“origin”:“WindowMixin._getLengthPix”,“context”:“when converting a length from stimulus unit to pixel units”,“error”:“unable to deal with unit: degFlat”}

Units must be height, norm or pixels to work online.

Wakefield's Daily Tips

Use height units If you are using a head rest or controlled environment where you have set up the monitor details in the PsychoPy monitor centre then feel free to use cm or degrees. This is particularly recommended if you are presenting stimuli to two screens. On the other hand, if you aren’t controlling the distance between the participant and the computer or are running your study online, I would recommend using height units rather than pix or norm. In norm units the screen is 2 x 2 (bottom …