I have just created a new content type for my site, and wrote a few rules which act when an instance of that type is created. I went to create a few test instances of my new content type and noticed that it did not appear on that 'Add content' screen (mysite/node/add.) 'No problem' I thought, 'I'll just go to mysite/node/add/new_type.' However, this failed to work too. The page loaded as as the url I submitted, but it appeared to be a duplicate of mysite/node/add. This is a problem because I can not add new content of this type.
I have a few other content type that do not appear on the mysite/node/add, but this was never problematic because I could still create new content of that type by visiting mysite/node/add/some_other_type.
I found that I can create new instances of this content type using Development: Generate Content (and the rules work just fine.) Still, I have yet to figure out why I cant get to the creation page manually. What could be causing this?
A newly added content type (just called test with no other changes or fields added) does not appear either (even with all permissions set to 'registered user').