Why in editor window script the variable serializedProperty is null in OnGUI ?

Unity Engine
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1

I changed the array objects to be static because i wanted it to be updated once i open the window so i call it in the ShowWindow method the problem is that the variable serializedProperty is null.

2

static things are not serialized and not shown in the inspector. if you want to do UI for a static filed you can not use the property will need to use the basic UI fields to get the value from the UI and set it.