If you are using SQL Server Reporting Services (SSRS) as a reporting solution, and must change your device's PC name, SSRS may not correctly generate and display reports once the computer has been renamed. To correct this, perform the following steps:
Open the Reporting Services Configuration Manager.
Click the Database Tab.
Modify the existing database, and simply follow the prompts.
Once the procedures and steps are completed, try to re-run your Reports.