It seems like the auto update KB2752087 breaks power pivot and produces the following error "We couldn't get data from the Data Model. Here's the error message we got: Invalid pointer array". After this update installed you are no longer able to
view PowerView sheets in your workbook.
This problem has been discussed in this old support blog post that dealt with the same error in 2013.
Who can I contact to update the blog post or create a new blog post with a fix? It seems like quite a few people are suffering from the problem.