runTimePostProcessing functionality is not available in precompiled packages of v1912.
I will note how to compile OFv1912 with runTimePostProcessing.
cd $WM_THIRD_PARTY_DIR makeParaView
check the VTK version with the following command.
If the version is 8.2.0, create a link with the name of VTK-8.2.0.
ln -s ParaView-v5.6.3/VTK/ VTK-8.2.0
Now, compile the VTK.
Then, prepare for the OF compilation.
wmRefresh cd $WM_PROJECT_DIR export ParaView_DIR=$WM_THIRD_PARTY_DIR/ParaView-v5.6.3 export VTK_DIR=$WM_THIRD_PARTY_DIR/build/linux64Gcc/VTK-8.2.0/
Finally, compile OpenFOAM-v1912.
foam ./Allwmake -j -s -l
You can check the functionality with tutorials/incompressible/simpleFoam/windAroundBuildings.
You can build ParaView 5.6.3, including with the ability to use Python and MPI. Options are same as explained here at OpenFOAM WiKi.
It may be easy if you use a script like this example provided in a ThirdParty directory.