I am having an issue with Nintex forms 2010. User A who is the site owner is able to edit and view the display view of the nintex form in a list. However user B who is a "full owner" and has every right of the list and site is able to edit the list item created by user A but gets "access denied" when trying to view the display view of the nintex form.
Also any non user A is unable to search in the people picker group.
I was able to resolve this issue. I realized the people picker was not allowing anyone outside the members in the group to view it which was causing the access denied issue.
That's great news you have it resolved! Thank you for posting back the solution, it will definitely help others in the community. Please mark your own answer correct to help identify it.