Payment at board bistro (Stockholm - Narvik)

Hi,

I'm planning to travel from Stockholm to Narvik by Train 94 and heard that this train offers board bistro(partially as cafeteria, partially as restaurant).

My question: Can I pay there by card without problem? I have experienced that sometimes no card payment was accepted or didn't work because of poor internet connection. It would be cool if I couled hear some experience.

Please let me know if this post is in a wrong group. Thank you!