I am using GP Premium (SEO = All in One). Simply configuring breadcrumbs plugins like ‘Breadcrumb NavXT’ or ‘Flexy Breadcrumb’ doesn’t give the expected results. So far I have not used GP elements, hooks or anything like that.
I also have a problem with the breadcrumbs.
I did exactly, step by step what you did describe above, but it seems nothing happens nor appears on the postpage Creativiteit, https://rickmoeliker.nl/creativiteit/