App Launch Fails for IOS users- Error: "Engine was not loaded. The remote SSL peer sent a handshake failure alert. Error Number: 183."
Go to iOS Receiver Settings > Advanced > TLS versions >TLS 1.0, 1.1 (NetScaler compatibility)
Or, upgrade NetScaler according to CTX221453 - Citrix Receiver - SSL Error When Connecting via NetScaler.
Compatibility issue between NetScaler 10.1 131.11 and iOS Receiver 7.5(build 9)