Sorry the Next script function “retrieve your boards” on pinterest works fine – a day later after changing setting on pinterest boards. Has something to do with the (sub)domain.
When you change setting on the boards in pinterest, or make e new board it takes 24 hours to change the “cache” on servers around the world.(Same with registering a new domain or changing the nameservers)
Once that is done, everything works fine. Nothing to do with Nextscripts – Snap. Again: the best plugin ever.