Broken Processing models are nasty and this error is particularly unpleasant:
... File "/home/agraser/.qgis2/python/plugins/processing/modeler/ ModelerAlgorithm.py", line 110, in algorithm self._algInstance = ModelerUtils.getAlgorithm(self.consoleName).getCopy() AttributeError: 'NoneType' object has no attribute 'getCopy'
It shows up if you are trying to open a model in the model editor that contains an algorithm which Processing cannot find.
For example, when I upgraded to Ubuntu 16.04, installing a fresh QGIS version did not automatically install SAGA. Therefore, any model with a dependency on SAGA was broken with the above error message. Installing SAGA and restarting QGIS solves the issue.