I have a quick fix: As the error says, Psychopy is looking for the prefs variable useRunner
. The variable is not set in your userPrefs and you cannot set it through the builder interface for now. You can, however, go to your preference file userPrefs.cfg
, which will be in a folder like %APPDATA%psychopy3 on Windows and ~/.psychopy3 on Linux/MacOS and create an entry for useRunner there.
In this file, add the line useRunner = False
somewhere under this heading:
# General settings
[general]