Error in ffprobe3 module

When trying to run against directory full of video project folders, get the following error. Seems to be a problem with certain files. Suspected files contain the extension ".mp4.pfl"

Exception in Tkinter callback
Traceback (most recent call last):
File "/usr/lib/python3.6/tkinter/__init__.py", line 1705, in __call__
return self.func(*args)
File "/home/dustin/Documents/Projects/CodecRenameUtility/JUNK.py", line 153, in add_pressed
metadata = FFProbe(str(current))
File "/usr/local/lib/python3.6/dist-packages/ffprobe3/ffprobe.py", line 47, in __init__
self.streams.append(FFStream(data_lines))
File "/usr/local/lib/python3.6/dist-packages/ffprobe3/ffprobe.py", line 78, in __init__
(key, val) = a.strip().split('=')
ValueError: not enough values to unpack (expected 2, got 1)