Same, but I finally got it working with the steps from the video linked in this post Epic Games Launcher version 19.0.0 does not start on Core 2 Duo CPUs due to lack of SSE4.2 support. - #21 by Knowdlord1
The trick for me seemed to be to go and get the version recommended in the video (18.10.0), not the slightly newer version linked to 2 posts above that (18.12.1).