CRM 2011: Hitting Save Quote does not do anything, record not saved

Problem:
As described in the subject line, when user hits the Save/Save & Close button, nothing happens. Quote records are not saved, not even a post back happens when hitting save. We checked all different scenarios and nothing worked as Save event was not triggered.

Configuration:
Users/Team were assigned OOB “Sales Person” roles.
Entity: Quote

Resolution:
Give Product entity a full access to the security role and check saving again. It should work.