The earliest recollection of this bug is traced back to PAN-OS 10.2.8 - March 11, 2025. This bug is fixed in PAN-OS versions 10.2.8. Fixed an issue where Clientless VPN access failed with the error message temporarily unavailable when accessing the Clientless VPN bookmarked application from the identity provider application portal. For more information: https://docs.paloaltonetworks.com/pan-os/10-2/pan-os-release-notes/pan-os-10-2-8-known-and-addressed-issues/pan-os-10-2-8-addressed-issues