Grey screen when opening project, as if it did not exist


I have been working on an application for a very long time, but now, when I access it from the Projects menu, it sends me to a grey screen, where the only visible element is the blue Message bubble. It is as if the project does not exist anymore, but I can still see it in my project menu.

What is weird is that I always create a copy of my projects in case something like this happens, but the copy is also completely grey. The rest of my projects are working normal.

Please help me, this is my final project for my school and it is due thursday. I would greatly appreciate any help.

Thank you!
Here is the screenshot of what I see.


I think this is a temporary problem. I also saw a gray screen and other oddities in the work of the IDE, but the developers are trying to fix them.