Exception in Tkinter callback
Traceback (most recent call last):
File "/usr/lib/python3.7/tkinter/__init__.py", line 1702, in __call__
return self.func(*args)
File "/home/jon/.local/lib/python3.7/site-packages/Fabian/appWin.py", line 791, in GoRock
rockdata.run()
File "/home/jon/.local/lib/python3.7/site-packages/Fabian/rocker.py", line 43, in run
next(series)
TypeError: 'image_file_series' object is not an iterator