Cannot switch back to original language

when i open my page, it shows in original language, which is good.
then i want to switch to english version, and it does, Good.

i want to switch back to original language (danish) but when i click on switcher it just loops back to english. making it unable to switch back to danish

i get this error in console when i try switching:

/ny-side/en/:1 Failed to set referrer policy: The value ” is not one of ‘no-referrer’, ‘no-referrer-when-downgrade’, ‘origin’, ‘origin-when-cross-origin’, ‘same-origin’, ‘strict-origin’, ‘strict-origin-when-cross-origin’, or ‘unsafe-url’. The referrer policy has been left unchanged.

The page I need help with: [log in to see the link]