The vendor has published 3 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-12626] [UPM-10481] 2. When a duplicate session exists for the same user, sign-in might fail with the error "The Group Policy Client service failed the sign-in. Access is denied." 3. 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/us/en/profile-management/2507-ltsr/whats-new/cumulative-update-2/fixed-issues.html 2. https://docs.citrix.com/us/en/profile-management/2607-ltsr/whats-new/fixed-issues.html 3. https://docs.citrix.com/us/en/profile-management/current-release/whats-new/known-issues.html