All shaders / materials turned transparent and started flickering

Out of the blue when I opened my project for the first time today and all the shaders turned like this, I did nothing for it.

I already try to make other materials (since I was using only the default ones), force recompile the shaders, even change my graphics card driver, nothing…

Making clear that I really not change anything, just opened the project one time and this happened.

My theory is that I clicked some hotkey by accident or something, I am new with ue

What is happening

Looking at the top left on your screen, it seems like you are using the default settings. If you create a completely new project, using the First Person template, does the same issue appear (Everything being white)?

Other projects were fine, in fact, then I just moved the stuff from this project to another empty one. Fingers crossed for this not to happen again.