I am using SharePoint 2010. We have a list where a user (group) has Contribute permissions but are not able to click on the "Add new item" button in the list. When they click on the button, it throws an Access Denied error.
In the Advanced Settings of the list, I have confirmed that users can create and edit all items. We have tried breaking and re-inheriting permissions. When we break permission inheritance, the group cannot even view the list. When permissions are re-inherited, the group can view the list, but they cannot add a new item to the list.
Does anybody have a suggestion on how to resolve this?