cmssw: [GPU] 11634.X RelVal failures during processing of Python configuration

Example log file

Starting python3 /pool/condor/dir_10183/jenkins/workspace/ib-run-relvals/cms-bot/monitor_workflow.py timeout --signal SIGTERM 9000  cmsRun -j JobReport2.xml  step2_DIGI_L1_DIGI2RAW_HLT.py
----- Begin Fatal Exception 12-Oct-2021 09:04:49 UTC-----------------------
An exception of category 'ConfigFileReadError' occurred while
   [0] Processing the python configuration file named step2_DIGI_L1_DIGI2RAW_HLT.py
Exception Message:
 unknown python problem occurred.
RuntimeError: Unable to cast Python instance of type <class 'NoneType'> to C++ type 'std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >'

At:
  /cvmfs/cms-ib.cern.ch/nweek-02702/slc7_amd64_gcc900/cms/cmssw/CMSSW_12_1_GPU_X_2021-10-11-2300/python/FWCore/ParameterSet/Config.py(1163): _insertPaths
  /cvmfs/cms-ib.cern.ch/nweek-02702/slc7_amd64_gcc900/cms/cmssw/CMSSW_12_1_GPU_X_2021-10-11-2300/python/FWCore/ParameterSet/Config.py(1323): fillProcessDesc
  <string>(2): <module>

----- End Fatal Exception -------------------------------------------------

Only occurs in GPU IBs