Cannot build a custom solver

Hi,I couldn’t build a custom solver, and the compiler couldn’t choose gfortran or mpifort. This causes an error when generating the solver. What is the cause of this?

It looks like you don’t have GNU make installed.
I don’t know what your platform is - you can either install it from the vendor packages (requires root access), or inside the MFiX conda environment:

$ conda activate mfix-23.2 
(mfix-23.2) $ conda install -c conda-forge make