py2app error

A Tkinter app I am building on 10.13 with py2app 0.14 is crashing with 
this error:

Traceback (most recent call last):
   File 
"/Users/kevin/Programming/quickwho/dist/QuickWho.app/Contents/Resources/__boot__.py", 
line 98, in <module>
     _run()
   File 
"/Users/kevin/Programming/quickwho/dist/QuickWho.app/Contents/Resources/__boot__.py", 
line 82, in _run
     exec(compile(source, path, 'exec'), globals(), globals())
   File 
"/Users/kevin/Programming/quickwho/dist/QuickWho.app/Contents/Resources/QuickWho.py", 
line 8, in <module>
     from tkinter import *
   File "<frozen importlib._bootstrap>", line 961, in _find_and_load
   File "<frozen importlib._bootstrap>", line 950, in 
_find_and_load_unlocked
   File "<frozen importlib._bootstrap>", line 646, in _load_unlocked
   File "<frozen importlib._bootstrap>", line 616, in 
_load_backward_compatible
   File "tkinter/__init__.pyc", line 36, in <module>
ValueError: character U+6573552f is not in range [U+0000; U+10ffff]

I am not certain of how to proceed. Please advise.

-- 
Kevin Walzer
Code by Kevin/Mobile Code by Kevin
http://www.codebykevin.com
http://www.wtmobilesoftware.com

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