Product type selector is hidden

The product type selector (simple, variable, etc) is not showing up for some reason. The downloadable and virtual checkboxes are also hidden:

They should appear to the right of “Dados do produto”. While inspecting the page’s source code I found:
<span class="product-data-wrapper type_box hidden">
which is the wrapper for these options. I don’t know if uiXpress added that “hidden” class but removing it makes them visible again: