Unauthorized: You are not allowed to access 'xxx.yyy' in this context

You are trying to set-up a Plone site where authenticated users can create and submit content. You have set-up "Add portal content" and "Add XXX content type" permissions for your Authenticated/Member users. Still, users cannot add the content but get the following exception when trying creating an item:

Module ZPublisher.Publish, line 113, in publish
Module ZPublisher.mapply, line 88, in mapply
Module ZPublisher.Publish, line 40, in call_object
Module Products.CMFFormController.FSControllerPythonScript, line 109, in __call__
Module Products.CMFFormController.Script, line 141, in __call__
Module Products.CMFCore.FSPythonScript, line 108, in __call__
Module Shared.DC.Scripts.Bindings, line 311, in __call__
Module Shared.DC.Scripts.Bindings, line 348, in _bindAndExec
Module Products.CMFCore.FSPythonScript, line 164, in _exec
Module None, line 19, in createObject
<FSControllerPythonScript at /imc/createObject used for /imc/test> Line 19
Unauthorized: You are not allowed to access 'howtopage.2007-03-22.2921481349' in this context

Solution

You need to modify the workflow of the item. Your initial state probably gives edit/access permission to owner/manager only. Try adding access/modify permissions to Authenticated or Member users too.