This article is intended for Citrix administrators and technical teams only.
Non-admin users must contact their company's Help Desk/IT support team and can refer to CTX297149 for more information.
The following error is returned by the Citrix Gateway to Citrix CWA app when application/desktop launch fails:
Failed to launch session <session_name>. Error code: 2502
This error indicated that backend VDA is unreachable for Enlightened Data Transport.
To resolve this issue check firewall rules for UDP reachability to VDA,