Traceback (most recent call last):


 "_ctypes/callbacks.c", line 232, in 'calling callback function'


 "/Users/jannikbuddeberg/.local/share/virtualenvs/toga-test-ZxzYLZpq/lib/python3.7/site-packages/rubicon/objc/api.py", line 232, in __call__

result = self.py_method(py_self, *args)


 "/Users/jannikbuddeberg/.local/share/virtualenvs/toga-test-ZxzYLZpq/lib/python3.7/site-packages/toga_cocoa/widgets/internal/cells.py", line 74, in drawInteriorWithFrame_inView_

icon = self.objectValue.attrs['icon']
KeyError: 'icon'

Traceback (most recent call last):


 "main.py", line 200, in <module>

init_tutorials()


 "main.py", line 163, in init_tutorials

tutorial_dict["page_title"] = tutorial.decode("utf8")


 "C:\Python27\lib\encodings\utf_8.py", line 16, in decode

return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode byte 0xe0 in position 9: invalid continuation byte
