EPM add-in throws an error with "Exception has been thrown by the target of an invocation" when i click the Activity workplace in EPM-Activity(red square in left bottom of screenshot). when i click it, it should open another Report. but it doesn't work.

We are running EPM Add-in 10.0 and Analysis Office 2.8.1.
We found that when deactivating the A-Office in Excel Com add-ins, then it works fine. But our users need both add-in at the same time
i think it's crash with EPM and AO. Can anyone tell me if there is a way to solve this trouble?