The python code examples in section 3.1 don't work.

When executing python code, an error message is displayed in section 3.1.:
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
~\AppData\Local\Temp/ipykernel_3356/82368212.py in
16 to_del.append(s.mesh)
17 for m in to_del:
---> 18 del slice._subslices[m]
19
20 extent = (slice.extent[0][0], slice.extent[0][1],

TypeError: unhashable type: 'Mesh'

Version: fdsreader1.9.1 , FDS 6.7.5

I ask you to update the python code in section 3.1.

I'm new to the fdsreader library