My construct doesn't work in any project when I play

My Construct doesn't work when I try to test the game, it just stays white (the color of the layer's background), but the objects don't appear.

I've already tested it with other browsers, other projects, with and without an account, but it still doesn't work.

Press F12 in preview and check for error messages in the console.

It's also possible it's correct: maybe you have an opaque layer on top of everything that is hidden in the editor.