Plugin Start Up Error - "symbol not found"

I have a Mac ARM laptop with macOS Sonoma installed. I am trying to run some plugins that used to work but now fail on startup when I try to use gumbo. A simple plugin without gumbo still works fine.

#Import:
import sigil_gumbo_bs4_adapter as gumbo

This is the error I get:
File "/Applications/Sigil.app/Contents/plugin_launchers/python/sigil_gumbo_bs4_adapter.py", line 35, in <module>
import sigil_gumboc as gumboc
File "/Applications/Sigil.app/Contents/plugin_launchers/python/sigil_gumboc.py", line 132, in <module>
SourcePosition.EMPTY = SourcePosition.in_dll(_dll, 'kGumboEmptySourcePosition')
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^
ValueError: dlsym(RTLD_DEFAULT, kGumboEmptySourcePosition): symbol not found
Error: dlsym(RTLD_DEFAULT, kGumboEmptySourcePosition): symbol not found

Any suggestions for correcting this would be appreciated.