"Render to texture is not supported by Pixel Perfect Camera. UnityEngine.U2D.PixelPerfectCamera:Awake () (at Library/PackageCache/com.unity.2d.pixel-perfect@5.0.1/Runtime/PixelPerfectCamera.cs:162)"
If 5.0.3 didn’t fix, I’ll check 2021. This guide was initially written for 2021 so it should work best on it. I’m replying to your other thread for now too.