We received a complaint from a user regarding a newly installed Report Builder that was not functioning properly. Upon attempting to open the application, it would immediately close. To troubleshoot, we tried running the application with a local admin account (the same account used for the installation), and it successfully launched. In the Event Viewer, we discovered an error associated with a ‘System.UriFormatException’.
Uninstalling and reinstalling the Report Builder did not resolve the issue, nor did adding the user’s logon account as a local admin.
Our analysis suggests that the uninstallation process may have left behind remnants of the Report Builder configuration, leading to a corrupt or misconfigured config file specific to the user. To address this, we deleted the User Config file, located at
%LocalAppData%\Microsoft\Report Builder\10.50.0.0
Deleting this file ensures that a new configuration file will be generated the next time the user launches the application, allowing them to successfully open Report Builder once again.
KennyL System Admin 