I've been following how to add a custom layout template to BigCommerce's stencil based theme. Here are the directions: https://stencil.bigcommerce.com/docs/custom-layout-templates
In the store/merchant backend, the place where you would select a custom template is missing. I contacted customer service and they said there is nothing on their end that has to be made to change the account to a beta status as shown on the above link. Does anyone know how to make the page layout dropdown box reappear?