AttributeError: 'NoneType' object has no attribute 'clearcolor'

[Deleted user]

Traceback (most recent call last):
File "main.py", line 45, in
Window.clearcolor = utils.get_color_from_hex('#ffffff')
AttributeError: 'NoneType' object has no attribute 'clearcolor'

Kivy: 1.8.0
Python: 2.7.6
OS: Ubuntu 14.04 (64 Bits)

[mvasilkov]

I think this means that no usable Window providers are available. Can you run any other Kivy program inside the same environment?

[Deleted user]

Update everything from Kivy official source. Now it works. Thanks a lot.