opensesame message 'Failed to read .xlsx file'
I have given the following message
Failed to read .xlsx file: /var/folders/32/htncvps11bzf4dt70yw_z3c40000gn/T/tmpebAYEB.opensesame_pool/Stim_01_1.xlsx
when I try to run a basic experiment. the xlsx file is in the file pool and apparently runs on another mac machine. I am also told "Import error - there is no module named openpyxl"
Can you please help me?