I have exactly the same problem as described by zerg686 asked 8 months ago concerning the Admin panel
All is well with versions up to 3.00, but using Version 3.4 and later:
i cannot access the following (meaning Menu is displayed in the dashboard but when i click it only blank page shows at the right side of the screen):
The following remaining three i can access:
The browser console does not report an error. Purging cahe does not help either.
I have tried it on different domains that use different themes and plugins
all are on same hosting service / provider