TypeError in getProject function

[bit0rez]

red.getProject('some_project')
Traceback (most recent call last):
File "", line 1, in
File "redmine.py", line 321, in getProject
return self.Project( self.get('projects/'+projectIdent+'.xml') )
File "redmine.py", line 220, in Project
return _Project( self, eTree )
File "redmine.py", line 23, in init
self.parseETree( eTree )
File "redmine.py", line 46, in parseETree
for field in self.root.find('custom_fields'):
TypeError: 'NoneType' object is not iterable

Redmine 2.0.x