One of node-app routes stopped working (Cannot GET)

Here is the repo page: GitHub - Flmob/asa-games-bot: Special for Asa no Sora
App URL: https://asa-games-bot.onrender.com

I have few games on different routes (Do not apply actual links because of limitations for new users):
URL/2048/
URL/flappy-bird/
URL/tetris/
URL/snake/

And they work just fine. But for some reason one of them stopped working with the latest update:
URL/t-rex/

Maybe it is not working because t-rex game is in separate repo. But it worked one commit ago. Also locally everything look just fine. What can I do to fix that?

Ok, I see the problem. Looks like submodule link is broken. Trying to fix it now…