I can't find my level in the editor.

Hi, I’ve made 5 different levels in my game which have gone from Level0… to Level4. Everything was working fine yesterday, but today when I’ve opened it the level is missing but I can still see it’s file in file explorer.

I would like your help in order for me to restore it back as It was before so I can finish it.

-Here I’m attaching two screenshots of the previous said conditions;

image

And another thing, now that I’ve tried entering the level with a triggerbox from previous level I get this message;

Can anyone help me out with this?

I’ve tried something I’ve seen that works for other people by creating a level by the same name and that It says that it already exists and opens the old one, but It didn’t work for me. Thankfully I saved the old file so I replaced it back, but I still have no idea how to fix it.