Here are some clues :
Make sure your GPU can handle the version of DirectX Unity is using (example : Unity running with DX11 and GPU was only capable of DX10).
Build Settings PC, Mac & Linux Standalone -> Other Settings -> Rendering : Disable
Automatic Graphics API and reorder the list of Graphics APIs for Windows that appears so that DX11 is at the bottom.
Go to the top menu:
Window -> Lighting -> Scene. Uncheck
Auto at the bottom of the panel and click on
Clear baked data in the dropdown menu next to the
Also, in the
Lightning panel, under the
Environment Lightning section, set to
Reflection Source -> Compression field.
Try to download the shaders assets of Unity and use the downloaded Standard shader
Turn off the HDR in Cubemap capture settings for the reflection probe