I got exactly the same thing (103 error from Object Desktop client, and stuck installer via Start11 directly), and when I click on the downloaded binary directly it comes up that the exe is incomplete or corrupted.
I am on latest and greatest Windows 10 pro with all Microsoft updates applied so Version 10.0.19044 Build 19044, Windows 10 Pro on Dell XPS 15 and 64bit.
Trying to install Start11 v1.22 production (I currently have 1.22 beta if that makes any difference) and the downloaded file size is 42,114,729 bytes according to the exe properties). I have tried downloading multiple times, with same outcome and filesize - I only use Windows Defender as AV (latest patches).
