A published application is failing to launch on the client PC without any errors

Symptoms

• A published application is failing to launch.
• The problematic app's process appears in RDSH's Task Manager but after 25 seconds, the whole session is logging off.
• From the end user's perspective there are no any errors listed, just nothing happens after launching an app.
• Some generic applications (e.g. Notepad) published from the same RDSH are working without any problems.
• Verbose client log is not indication any errors, only the session disconnect event:

Cause

An app in question requires a lot of time to load (due to the configuration files or other dependencies). By default, RAS is logging off a session if the application did not load the UI within 25 seconds.

Resolution

Increase the disconnection timeout from the default 25 seconds to 1 minute - right-click on an RDSH  in RAS Console > Set Publishing Session disconnection timeout to 1 minute.