XDMF Export does not generate a valid XDMF file

I have been scratching my head at the following issue:

from fenics import *

# Create mesh
mesh = UnitSquareMesh(8, 8)

# Save mesh to file in XDMF format
xdmffile_open = XDMFFile('mesh.xdmf')
xdmffile_open.write(mesh, XDMFFile.Encoding.HDF5)
xdmffile_open.close()

This code (on the cluster where I installed FEniCS myself) generates an XDMF and a H5 file, and the H5 file looks good. However, the XDMF file does not have the correct file structure of the h5. This of course makes Paraview crash. The errors are:

in the topology part: the mesh.h5 should be followed by a “:/Mesh/mesh/topology”
in the geometry part: the mesh.h5 should be followed by a “:/Mesh/mesh/geometry”
if I were to export a function swell, then there the mesh.h5 should be followed by a “:/VisualisationVector/0”

However, none of this is the case. I have attached the xdmf and the h5 file that were generated on the cluster. I assume this is an error in the configuration on my side, but I really don’t know where to look for the mistake. Maybe someone has an idea beforehand, though? I have tried the same code on a workstation and there the file structure is generated correctly.

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