Deus Ex: Mankind Divided won't start

Hello. I installed DEMD on an external HDD by specifying a different install path during installation. After it was installed I tried to run it. I can see the external HDD's light go on so it's actually reading stuff, but the game doesn't start. Nothing happens at all on my screen.

Heroic itself shows "Playing (Stop)" on the button for a couple of second before reverting to "Play Now."

I added the log to my post.
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