Null Reference Exception on a fresh project

[davididev]

First debug message: Rebuilding Library because the asset database could not be found!

Exception when I click "Generate" on the example:
NullReferenceException: Object reference not set to an instance of an object
AIShader.OpenAIUtil.InvokeChat (System.String prompt) (at Assets/Editor/OpenAIUtil.cs:48)
AIShader.AIShaderImporterEditor.Regenerate () (at Assets/Editor/AIShaderImporterEditor.cs:28)
AIShader.AIShaderImporterEditor.OnInspectorGUI () (at Assets/Editor/AIShaderImporterEditor.cs:51)
UnityEditor.UIElements.InspectorElement+<>c__DisplayClass71_0.b__0 () (at :0)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)

[keijiro]

Please check #1