I install mfix-21.1.2 and meet the same problem with DillonLabban, when I follow your reply, I find that the tbb version is 2020.2 hff7bd54_0 and type python -c "import vtk" and it shows:
(mfix-21.1.2) user@user-virtual-machine:~$ python -c “import vtk”
File “”, line 1
“import
^
SyntaxError: invalid character in identifier
I can’t understand what has happened and it still occurs the problem I meet today. So what can I do now?