Try this for the Reporting Services issue.
1 > Navigate to SQL Report Manager
2 > Drill into Data Sources
3 > Drill into GPDYNAMICS > Properties
4 > Change "Integrated Security=False" in the Connection String box
5 > Select "Credentials stored securely in the report server" under the Connect Using section
6 > Enter a user name with access; we use "sa" and the SQL sa password
7 > Test connection
8 > Do the same procedure for GPXXX data source
9 > Now try accessing pages with KPIs/Charts and reports