Texture 'reflections' is not readable

UnityException: Texture 'Reflections' is not readable, the texture memory can not be accessed from scripts. You can make the texture readable in the Texture Import Settings.
UnityEngine.Cubemap.GetPixels (CubemapFace face) (at C:/BuildAgent/work/d3d49558e4d408f4/artifacts/EditorGenerated/TextureBindings.cs:358)
ShaderForge.SFN_Cubemap.RenderToTexture ()
ShaderForge.SFN_Cubemap.DeserializeSpecialData (System.String key, System.String value)
ShaderForge.SF_Parser.DeserializeNode (System.String row, System.Collections.Generic.List`1& linkList)
ShaderForge.SF_Parser.LoadFromNodeData (System.String data, System.String& missingNode)
ShaderForge.SF_Parser.ParseNodeDataFromShader (ShaderForge.SF_Editor editor, UnityEngine.Shader s)
ShaderForge.SF_Editor.InitializeInstance (UnityEngine.Shader initShader)
ShaderForge.SF_Editor.Init (UnityEngine.Shader initShader)
ShaderForgeMaterialInspector.OnInspectorGUI ()
UnityEditor.InspectorWindow.DrawEditors (Boolean isRepaintEvent, UnityEditor.Editor[] editors, Boolean eyeDropperDirty) (at C:/BuildAgent/work/d3d49558e4d408f4/Editor/Mono/Inspector/InspectorWindow.cs:850)
UnityEditor.DockArea:OnGUI()


This was with trying to use a cubemap created with Unity's RenderToCubemap script
https://docs.unity3d.com/Documentation/ScriptRefer...
maybe another suggestions for creating cubemaps in unity that does work?