Here is an error that came up launching a dashboard that sounds like a localization issue, but it’s not.
Clicking ‘OK’ lets you access the dashboard.
The issue is typically a permissions issue. Check that the role experiencing this symptom has top level tab access to the business objects used by the dashboard. If that doesn’t solve it then check the permissions of the saved searches used. A really quick way, and perhaps the best way to troubleshoot if you can’t shake this error, clone the dashboard in your DEV (STG/UAT) environment and remove dashboard parts one by one to identify the culprit.
ITSM/ITAM/ESM Blog 