"Unable to import newly created asset" errors are logged when creating a material from InitializeOnLoad

Asset operations such as asset loading should be avoided in InitializeOnLoad methods. InitializeOnLoad methods are called before asset importing is completed and therefore the asset loading can fail resulting in a null object. To do initialization after a domain reload which requires asset operations use the AssetPostprocessor.OnPostProcessAllAssets callback. Docs: https://docs.unity3d.com/2023.2/Documentation/ScriptReference/InitializeOnLoadAttribute.html

Docs: https://docs.unity3d.com/2023.2/Documentation/ScriptReference/InitializeOnLoadAttribute.html Asset operations such as asset loading should be avoided in InitializeOnLoad methods. InitializeOnLoad methods are called before asset importing is completed and therefore the asset loading can fail resulting in a null object. To do initialization after a domain reload which requires asset operations use the AssetPostprocessor.OnPostProcessAllAssets callback. This callback supports all asset operations and has a parameter signaling if there was a domain reload.