3408308 - Analysis for Office, An exception occurred in one of the data sources

Analysis for Office crash while executing a "data validation" Excel function

Analysis for Office error:
An exception occurred in one of the data sources.

Logs show:
Throwing restart exception due to original exception: System.Runtime.InteropServices.COMException (0x800AC472)
111006 An exception occurred in one of the data sources. SAP BI Add-in has disconnected all data sources. 
Nested exception. See inner exception below for more details[msg.NestedException]
General .NET Exception 

2.8 SP19 (64bit)
Office is a 365 version, 64bit, up to date.

SAP_BASIS 751 0002
SAP_BW 751 0002
SAP_UI 751 0004

KBA , BI-RA-AO-XLA , Excel Addin , EPM-XLS , EPM Excel Client , Problem