Problem
When you program using python, you can see Error loading MPI DLL in mpi4py Solve error.
ImportError: DLL load failed:
Error loading MPI DLL in mpi4py Solve
......
Solve
In my case, just reinstall MPI via MPI. This works for me. https://docs.microsoft.com/en-us/message-passing-interface/microsoft-mpi. This is the link install MPI in microsoft.