Error when baking occlusion culling

I'm working on a projet where I need to bake occlusion culling. Everything was fine, I baked it several times to test things but now, today, I get an error in the console everytime I try to bake the occlusion culling. Assertion failed on expression: '(srcInfo.GetChannelMask() & copyChannels) == copyChannels' UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

I don't know what that means and found nothing about it. I found some posts about similar issues but nothing related to occlusion culling.

I'm working with Unity 2019.3.2f1