error in email sub-panel when upgrade from 7.8 to 7.9

when i have upgrade my suitecrm from 7.8 to 7.9 then i am getting below issue.

Fri Jun 30 02:26:52 2017 [19959][77f268dc-0dae-e1c8-deef-594b463c0e3b][FATAL] Failed to load original or custom subpanel data for eapm in modules//metadata/subpanels/.php

Hi

I suppose you already tried a Quick Repair and Rebuild?

the first thing to try next would be to upgrade to 7.9.2 which should be coming out today.

Then if the problem persists, please give some more information - your Operating system, and PHP version.

And does the error happen just entering the view, or do you click anything?