a little while ago was everything working perfectly. But now, when i have even just basic cube in the scene, then when i want to add texture or materieal, or even if i wont add any of them to the cube, when i go to Rendered viewport shading, all i see is this (just a grey cube with nothing on it, i have set the color tu blue but nothing):
And when i render it it shows just checkered cube like this:
I know its probably gonna be something dumb, but i just cant figure out what the problem is. Thanks for help.

