PLEASE HELP ME!!! ACCOUNT AT STAKE!!!!!!!
This has been happening to multiple users within the past few days. It's reasonable to assume the Replit Team is doing something about it, but from other Ask posts, it seems like either submitting your site to Google through one of their console things (I can't remember which) or time solves the problem.
Well you can get past it by typing thisisunsafe into the browser I believe. There must be a common trend among you websites that resemble fishing. I would suggest looking into what makes a website dangerous. This could also have to do with the way repl sets things up.