It looks like the profile you’re connecting wasn’t found. Make sure that you’re using the correct login and your game account privacy settings are set to public.
Hello , try logging into https://www.opendota.com which will sync your account. Once that’s done, you can try to readd the game to FACEIT
if the problem still persists , read https://support.faceit.com/hc/en-us/articles/208584605-Initial-Game-registration-Dota-2-FAQ