hello, I made and saved a project, in which I used a photo.png saying ‘hello’ for a few seconds. But when I load the project, there is nothing to see no sprite no text, what did I do wrong?

The program may have glitched and deleted it. I had the same thing happen to me on a different game.

This happened to me sometimes when I was making my biggest project. I was on a sluggish computer, but the sprites always came back at some point after refreshing a couple/few times as it probably didn't load correctly the first time. Try that

My browser / operating system: Windows NT 10.0, Chrome 67.0.3396.79, Flash 27.0 (release 0)

No idea. You need internet connection (unless you`re on the offline editor) and that might have been deleted by accident or from some weird glitch, maybe your game failed to load correctly..

But..

you can also contact the Scratch Team. I think the ``leader`` of Scratch is currently @ceebee .
You can also take a look at the list of Scratch Team Members and ask them for help.

Good luck, hope this helped.