EEVEE rendering materials don't work I'm new to Blender and I was getting hooked on this program. I was working on a project using the viewport shading set to Rendered with the EEVEE render engine because I don't have a very powerful graphics solution. However, last days, the materials on this project didn't appear in viewport shading, or even in the final render. All the previews of the materials have become completely transparent.
I thought it was just the damaged project, but unfortunately this problem occurred on all old and new projects. I leave some images and a file as examples. Opening the file on my friend's computer, the materials work (EEVEE), but I can't work on his machine. One more thing, using Cycles the materials work, but using EEVEE they don't work. Unfortunately I can't work using Cycles, it takes too much time and sometimes blender crashes.
I tried looking online for solutions to problem like mine or who had a similar experience and I have already tried to apply their various solutions, but none of these solve my problem:

Texture not visible in material preview
Viewport render image does not work correctly
Can&#39;t see material on my object
viewport-render-not-working

The last topic I didn't understand what should happen if I press Ctrl + Alt + B? Under the View menu, I didn't find View Borders, but using the blender command search I found Clear Render Border, I tried to activate the command but it didn't work.
I also tried reinstalling Blender, but it doesn't seem to work and it even remembered my personal configurations!
I also tried installing add-ons to try to find an alternative to the EEVEE engine (Radeon pro render [rpr], EEVEE-Preset) but no one of them are for me or repair the EEVEE engine.
If you find this information useful to solve my problem as computer I have a

Ryzen 5 2600 processor,
Radeon Rx 580 4 GB graphics card
16 GB of RAM.

Just a clarification, I use Blender 2.90.1, can someone tells me a way to restore the correct functioning of EEVEE materials? 
Unfortunately I no longer know where to turn and I'm crazy to see all my projects be transparent.



file di esempio test_box.blend
After doing some research, it's seems to be some kind of problem with the newer AMD drivers (I have the same graphic card as you do). You can try to downgrade your RX drivers or wait for the developers to fix this bug.