VALUES NOT SHOWING IN PIVOT TABLES

I have two instances and they were working properly until one after the other stopped showing values after i run analytics and cleared cache.

Both instances are running on 2.27 Build revision: dbacc42 and Build revision:e33b34d

We have not had any upgrades lately and all was well until this morning when i noticed i can not see my graphs with data on the dashboard.

Anyone with an idea?

Thanks