The vendor has published 1 unique mention(s) for this bug: 1. When one Delivery Controller™ is shut down in a redundant setup, you may be unable to sign in to Web Studio from the remaining controller. This issue occurs in version 2402 LTSR and displays the message: “Unable to sign in. Please try again later.” Latest urls for this bug: 1. https://docs.citrix.com//en-us/citrix-virtual-apps-desktops/2402-ltsr/whats-new/cumulative-update-3/fixed-issues