Hey @stepasyuk
Thanks for the quick reply! However I switched the template to archive and still it gives the same message when trying to add the widget. Maybe the integration with oxygen is the problem? Is there a way to manually register the widget so that it will be recognized?
so to make it extra clear:
the custom order notification itself that gets sent when a order gets in and is “processing”: works
the invoice pdf i made with the plugin attached to a standard woocommerce email: works
the invoice pdf attached to my custom order email: pdf gets made in plugin page but e-mail doesnt send!
