This is far from a minimum working example. We don’t have any of your files and no one would be able to run your posted example.
dolfin-convert is no longer maintained. I would suggest switching to meshio: GitHub - nschloe/meshio: 🕸 input/output for many mesh formats
you can also use the dolfinx.io.gmshio package to convert a gmsh mesh to xdmf and read with the XDMFFile class. See this thread for example.