try if mattersim works now

src/streamlit_app.py

@@ -27,7 +27,7 @@ import sys
 import pkg_resources
 from ase.vibrations import Vibrations
 import matplotlib.pyplot as plt
-mattersim_available = False
+mattersim_available = True
 if mattersim_available:
     from mattersim.forcefield import MatterSimCalculator
 # try: