Python GetLookupTableNames() call fails

I get this error when calling GetLookupTableNames() in pvpython:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Applications/ParaView-5.4.0.app/Contents/Python/paraview/simple.py", line 1382, in GetLookupTableNames
    return _GetLUTReaderInstance().GetLUTNames()
  File "/Applications/ParaView-5.4.0.app/Contents/Python/paraview/simple.py", line 1361, in _GetLUTReaderInstance
    import lookuptable
ImportError: No module named lookuptable

the _GetLUTReaderInstance() function looks something like this:

_lutReader = None
def _GetLUTReaderInstance():
    """ Internal api. Return the lookup table reader singleton. Create
    it if needed."""
    global _lutReader
    if _lutReader is None:
      import lookuptable
      _lutReader = lookuptable.vtkPVLUTReader()
    return _lutReader

I tried explicitly importing lookuptable with from paraview import lookuptable, but this doesn't seem to help.

I then tried to call lookuptable.vtkPVLUReader() manually, but got another error:

WARNING: default LUTs not found at /Applications/ParaView-5.4.0.app/Contents/Python/paraview/ColorMaps.xml

It appears to fail to find any colour maps, returning an empty list:

>>> lookuptable.vtkPVLUTReader().GetLUTNames()
WARNING: default LUTs not found at /Applications/ParaView-5.4.0.app/Contents/Python/paraview/ColorMaps.xml
[]

I noticed that the ColorMaps.xml does not exist in my ParaView installation. I looked back through the binaries on the website and the last version it existed in is ParaView 5.1.2.