Spotfire Python Data Function - 'Python Script DataFunction'

Installed the Python Data Function on SF 10.3 and python 3.8.  I'm able to successfully run python code with input parameters, but when I try to output data, it fails with the following message.  In doing research, I found many threads around the same issue.  I've ensured proper labeling and typing of input/output parameters, proper installation of python 3.8, proper installation of numpy and pandas.  Any other ideas?   

Could not execute function call 'Python Script DataFunction'

File not found: C:\Users\XXXX\AppData\Local\Temp\tmpCA48.stdf

   at Spotfire.Dxp.Data.Import.FileDataSource..ctor(String filePath, String[] additionalFilePaths)

   at SpotfirePS.DataFunctions.Python.PythonDataFunctionExcecutor.<ExecuteFunctionCore>d__4.MoveNext()

   at Spotfire.Dxp.Application.Extension.CustomDataFunctionExecutor.<Spotfire-Dxp-Data-DataFunctions-IFunctionExecutor-ExecuteFunction>d__5.MoveNext()

   at Spotfire.Dxp.Data.DataFunctions.DataFunctionExecutorService.<ExecuteFunction>d__3.MoveNext()