Hi. It looks like you (or someone) developed this model on an earlier version of MFiX and then upgraded to 24.1. The file des_thermo_newvalues.f has changed in the main MFiX source and the project you uploaded has a modified version, which was based off an earlier version and does not have the latest changes.
Try running
sdiff des_thermo_newvalues.f $CONDA_PREFIX/share/mfix/src/model
It appearst that when the new GSP model was added, a new subroutine INTRA_HEAT_COND_GSP was added to the des_thermo_newvalues module, which your modified version lacks. You need to either add this subroutine to your des_thermo_newvalues.f or copy the file des_thermo_newvalues.f from the source directory to your project folder and re-apply your (or chunlei’s?) changes, if they are in fact necessary for the model - otherwise just delete the modified file.