ExcelServerApp' threw an exception System.IO.FileLoadException:
Loading this assembly would produce a different grant set from other instances
If you already enable to display
excel file in browser on SharePoint.
Solution: Ensure to check the below In order to resolve this issue
Solution: Ensure to check the below In order to resolve this issue
1.
Verify Excel Services Application is running correctly from central admin
2.
Verify Excel Calculation Services is in Started status
3. Restart
the Excel Calculation Services