Hi Emily!
I think Ive been working from the right file here, but at the moment it is a bit tricky to debug because it seems you might need to adjust the sampling rates of your audio files.
The project I have been working from is here https://gitlab.pavlovia.org/lpxrh6/memorybias_debug
The error I ran into above is because there is actually a psyexp file outside of the MemoryBias folder with an identical name - and it seems that is the file your pavlovia project is actually using.
I can’t currently run this locally as I get the error outlined here Audio file loop is not working so you may need to edit your sound files (it is possible that may resolve your original issue)
Could I also suggest checking out the online crib sheet for recommended sound formats for online https://docs.google.com/document/d/13jp0QAqQeFlYSjeZS0fDInvgaDzBXjGQNe4VNKbbNHQ/edit
Let us know how you get on,
Becca