Cannot confirm this here with 4.0.1 RC. With a fresh blend file (default cube), scene switching is instant.
The minimum system requirements for Blender 4.0 increased. A GPU with at least OpenGL 4.3 support is required. For AMD this means at least a GPU with GCN 1 architecture.
Please provide all requested information, like exact description of the error, system infos and where you downloaded Blender from.
Can you please try the latest 4.0.1 RC from today? https://builder.blender.org/download/daily/
Can you please clarify what you refer to in your comment? First you say "Blender 4.0.1" then you write cd "blender 4.1.0". Do you use the 4.0.1 RC or 4.1 Alpha?
Can you please test if the 4.0.1 RC from https://builder.blender.org/download/daily/ works for you?
This is a 4.0 file, so opening it in older versions may have issues because of that. Would still treat this as high priority until told otherwise by the GP developer team.
Cannot confirm this on Windows, adding primitives or setting the cube in your file to flat shading works fine.
Can you please be more specific what's happening? You are trying to start Blender via Steam and it doesn't start?
Thank you for the report. Our code signing certificate was updated a few weeks ago, it may take a little more until Microsoft trusts it. You can install and use Blender safely.
@PratikPB2123 Feel free to put it onto the backport list #114706
@LazyDodo Can you take a look please?