Psychopy has internal error running older builder experiment

If this template helps then use it. If not then just delete and start from scratch.

OS (e.g. Win10): mac sonoma
PsychoPy version (e.g. 1.84.x):
Standard Standalone? (y/n) If not then what?: y
What are you trying to achieve?: Trying to run a psychopy builder experiment created (and working) in an older version c. 2021 in the newest version.

What did you try to make it work?: Ran the experiment with the green play button from the experiment runner.

What specifically went wrong when you tried that?:
Include pasted full error message if possible. “That didn’t work” is not enough information.

Psychopy3 internal error pops up:
Traceback (most recent call last):
File “/Applications/”, line 762, in runOnline
File “/Applications/”, line 1047, in currentProject
File “/Applications/”, line 1381, in getProject
ValueError: too many values to unpack (expected 2)

tail of the runner window
“/Applications/”, line 296, in init
raise RuntimeError(‘Error starting ioHub server: {}’.format(self.iohub_status))
RuntimeError: Error starting ioHub server: ioHub startup failed.

p.s. and now that this has happened I have to remove ~/.psychopy or else Psychopy won’t restart.