Modules are more or less standalone and should be easier to troubleshoot. There is the Override application menu roles checkbox, but that immediately didn't make sense as you both see the Self-Service menu that this is under (Ideas is just a separator module). It's probably worth trying with that checked. The module(s) you added the role to are under the Self-Service Application menu, correct?
This is what my module record looks like
We were restricting it to itil, but I changed it to idea_manager in this environment and confirmed a user with no roles only saw My Ideas. I added the idea_manager role to this user, then impersonated them and Create New appeared as expected.
An ACL could cause this module to be hidden. Is the idea_manager user able to create new idea records - either from the list view or a direct URL like this?
