I don't know to you but I can play the game on my PC, maybe your browser need an update or something. If you want, you can just download dead trigger pc and play online. It is a zombie-themed first person survival horror video game. It is originally available only in mobile phones, but with our version, the game is free to play on your PC and in Mac.

I'm having the same issue. I tried sending a ticket to the technical support but they are yet to respond. I tried uninstalling the game and reinstalling the game. This solves the problem to me. I encourage you to try the same.
I recommend this dress your favorite outfits game called Gacha Life, for the students out there download this rate my teacher app.