Link issue from checkout

Hi.

I have an issue with the plugin after update. When pressing checkout in the basket it does not get the right countrycode in the link for spreadshirt. And I can not figure out where it gets the links so I can change it.

This link comes out of the checkout: https://checkout.spreadshirt.nb/?basketId=51bea3a8-4abb-4f16-beb1-a747b3d8f7f4

What need to be changed is the .nb after https://checkout.spreadshirt.nb, it should be .no. When I manually change it it works. Please help, it is urgent.

https://ww.wp.xz.cn/plugins/wp-spreadplugin/