Sorry to hear you're running into that. Could you let me know what device you're using, and which browser you're playing on?
I tried running it on my Macbook's Chrome and could not reproduce the issue, do you maybe have some Chrome extensions installed that might be interfering with the game?
If it still shows white screen, maybe you could try running it on Firefox browser, as that is the recommended browser to play Serenitrove on. Hope it helps!