Hmm, If you join our discord server here: https://discord.gg/2TF5gVw3G8, I may be able to trouble shoot this easier. You can post it on our support channel with screenshots or any other additional details you may have.
Right now my thought is that some sort of anti-virus is shutting the game down for some reason. I can't think of why it would start up for a few seconds and then abruptly close otherwise.