Unstructured grid ghost cells generator doesn't work with non-mpi build of ParaView
Build PV without MPI enabled but the CS wrapping is still done for the unstructured grid ghost cells generator filter even though that filter isn't built because it's on FiltersParallelGeometry module which depends on the ParallelMPI module which isn't built.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information