Help with Eevee - materials are invisible if I use nodes

Good afternoon, I am a beginner level user. I used Blender normally until version 2.83.3. After installing 2.83.4, when using the nodes and the 'Shading' tab to apply a material and textures, the object is invisible when rendering with 'Eevee'. On other occasions, when rendering, everything appears in pink, even with applied texture - and that includes the 'World' background if the 'use nodes is enabled', disregarding texture or any other attribute of the object, but any attempt is enough of adjustment and the material becomes invisible again - as if cutting out the rendered image ... It works normally if I use the 'Cycles' renderer. I tried to reinstall version 2.83.3, but the problem persists. If anyone can help ...