The vendor has published 1 unique mention(s) for this bug: 1. A black screen with the error message “The Group Policy Client service failed the sign-in”. Access is denied.” might occur when a user launches a duplicate session on the same VDA machine. [UPM-10481] Latest urls for this bug: 1. https://docs.citrix.com//en-us/profile-management/current-release/whats-new/known-issues