I ran the installer with Admin rights. Same when I tried opening the app from the Start menu and the Studio folder (C:\Program Files (x86)\SDL\SDL Trados Studio\Studio15).
The description of the app says: *Created a new Version 18.104.22.168 for Studio 2019 SR1. Could that be the problem? I am running SR2.
I am using Studio 2019 SR2 (22.214.171.1241) and SR2 CU4 Beta 2.