An error about using Paraview to display GPRMAX models

I installed as a macro in Paraview. However, when I select the macro from the Toolbar I get the following error:

Traceback (most recent call last):
File “”, line 43, in

TypeError: startswith first arg must be bytes or a tuple of bytes, not str

Can someone please help me with resolving this error?

I appreciate your attention and effort.

What is this macro ?