Hi Mert
On http://www.nivaagaard.dk I have a lot of top-sliders. They all work in all three languages on the page except the one called: "Ændrede åbningstider og begrænset … 35 og 36" (first slide). This one said "oops something went wrong" when going from english or swedish.

I have tried making new page, changing the slug etc. No luck. All the slides are done the same way.

Do you have any idea what it is that is teasing?

Best,
Nethe