What does this mean?

What is this meaning, my other IAT experiment works.

Traceback (most recent call last):
File “C:\Users\Jacks\AppData\Local\Programs\PsychoPy\lib\site-packages\psychopy\app\builder\builder.py”, line 1275, in runFile
self.app.runner.panel.runLocal(event)
File “C:\Users\Jacks\AppData\Local\Programs\PsychoPy\lib\site-packages\psychopy\app\runner\runner.py”, line 749, in runLocal
generateScript(experimentPath=currentFile.replace(‘.psyexp’, ‘_lastrun.py’),
File “C:\Users\Jacks\AppData\Local\Programs\PsychoPy\lib\site-packages\psychopy\scripts\psyexpCompile.py”, line 86, in generateScript
raise LegacyScriptError(
psychopy.scripts.psyexpCompile.LegacyScriptError: Error: Script compile exited with code 1. Traceback:
Traceback (most recent call last):
File “C:\Users\Jacks\AppData\Local\Programs\PsychoPy\lib\runpy.py”, line 194, in _run_module_as_main
return _run_code(code, main_globals, None,
File “C:\Users\Jacks\AppData\Local\Programs\PsychoPy\lib\runpy.py”, line 87, in _run_code
exec(code, run_globals)
File “C:\Users\Jacks\AppData\Local\Programs\PsychoPy\lib\site-packages\psychopy\scripts\psyexpCompile.py”, line 237, in
compileScript(args.infile, args.version, args.outfile)
File “C:\Users\Jacks\AppData\Local\Programs\PsychoPy\lib\site-packages\psychopy\scripts\psyexpCompile.py”, line 226, in compileScript
version = _setVersion(version)
File “C:\Users\Jacks\AppData\Local\Programs\PsychoPy\lib\site-packages\psychopy\scripts\psyexpCompile.py”, line 125, in setVersion
useVersion(version)
File “C:\Users\Jacks\AppData\Local\Programs\PsychoPy\lib\site-packages\psychopy\tools\versionchooser.py”, line 220, in useVersion
reload(psychopy)
File "C:\Users\Jacks\AppData\Local\Programs\PsychoPy\lib\importlib_init
.py", line 169, in reload
_bootstrap._exec(spec, module)
File “”, line 604, in _exec
File “”, line 848, in exec_module
File “”, line 219, in call_with_frames_removed
File "C:\Users\Jacks\AppData\Roaming\psychopy3\versions\psychopy_init
.py", line 49, in
_userPackagePath = prefs.paths[‘userPackages’]
KeyError: ‘userPackages’