You appear to have an error in your own code, as evidenced by the
final line of the traceback (when in doubt, always *read* the error
message):
"Tried view_form in module px.heroes.views. Error was: 'module' object
has no attribute 'view_form'"
This says that your code tries to access something named "view_form"
in the module "px.heroes.views", but that there is no such thing
available. This raises an exception, which breaks everything.
(and the reason why you see this in the admin is because the admin
uses reverse URL resolution, which means it has to be able to import
all of your views -- any error, anywhere, in any of your views, will
break everything)
--
"Bureaucrat Conrad, you are technically correct -- the best kind of correct."