I fear you landed on the wrong page, eurail is only for non european residents.

https://www.interrail.eu/en/support/interested-in-interrailing/do-i-need-an-interrail-or-eurail-pass

If you live in Norway, then you live in Europe and you don't qualify for Eurail. Please go via interrail.eu to order an Interrail pass.

Haha ok that makes sense, thank you! 

But It seems like the webpage is not working,
when i click “add to cart” the page is just loading for ever…
 

When a website starts acting weird and retrying doesn't work, I usually clear the browser cache and delete the cookies for that website. For interrail.eu, I've had to do that a few times in the past. Does that help?

I tried from my phone instead of computer now, that worked. Thank you for the answers!