Since the update "CRM Online 2015 Update (7.1.1.4314) (DB 7.1.1.4309)" the "+" button to add new opportunity product stop working, nothing happens when clicking on it.
I found someone with the same problem here https://community.dynamics.com/crm/f/117/t/176528 but I didn't add any customization to the form neither change the name of the sub-grid(current name "opportunityproducts").
Is there anything that can be affecting the behavior of this specific button?
I tried creating a new form but same problem, only que "+" on the Quote sub-grid works.