Error: "Unable to launch your application. Contact your help desk with the following information: Cannot connect to the Citrix XenApp server. SSL Error 4: Attempted to connect using the (TLS V1.0 | SSL V3.0) protocols. The server rejected the connection" when trying to launch apps when SSL v3 and TLS v1.0 are disabled on the Netscaler Gateway Virtual Server.

• Check the Receiver version used by the clients and check if it's compatible with TLS 1.1 and TLS 1.2:
• Receiver versions below 4.2 are only compatible with SSL v3 and TLS 1.0
• Receiver version after 4.2 (4.2 included), are compatible with SSL v3 and TLS 1.0, TLS 1.1 and TLS 1.2

Problem Cause

• Receiver 4.1 only supports SSL v3 and TLS v1.0.
• Installed Receiver 4.4