black areas. also lumen visualization black

hi guys. I haven’t opened my project for a couple of weeks, and now upon opening it, I see some very dark areas. Even the Sky Light doesn’t help. What could this be? lumen visualization also black in specific areas. but it was wine previously.

there was a problem with allowing network for epic (i accidently decline it). then i spend few days with unreal assistan trying fix some stuff. i add everything in windows defender. i change my network status. i redownload launcher and engine. i try different engines. its seems like lightning not calcuating. surfaces in lumen black and pink. also assistance tell about ShaderCompileWorker.exe in task manager i also not see it