I have a advance module for admin, which make use of custom controller and custom view, it seem like I try to use the fuel_var on custom view and the sitevariables won't load.
You need to have it set to "auto" so that it will access the database. If it is set to just "view" then it won't attempt to grab any variables from the database.
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I have a controller which extends Module , then I ovewrite the create_edit view in the controller, to use my own views.