Traceback (most recent call last):


 "D:/2.6/build/inst/lib/python3.5/site-packages/cura\Settings\MachineManager.py", line 788, in setActiveVariant


 "D:/2.6/build/inst/lib/python3.5/site-packages/cura\Settings\MachineManager.py", line 769, in setActiveMaterial


 "D:/2.6/build/inst/lib/python3.5/site-packages/cura\Settings\MachineManager.py", line 832, in setActiveQuality


 "D:/2.6/build/inst/lib/python3.5/site-packages/cura\Settings\MachineManager.py", line 949, in _replaceQualityOrQualityChangesInStack
AttributeError: 'NoneType' object has no attribute 'getMetaDataEntry'

Traceback (most recent call last):

 "example/blog/tests/test_modelforms.py", line 437, in test_float_field
self.assertTrue(isinstance(widget, floppyforms.widgets.NumberInput))AssertionError: False is not true