Hello,
We can see that you use a different alias between the main configuration (English I guess) and NL.
Afterwards, I'm sorry but we do not have the requested elements to understand what is not working :
We would need more information about what you mean by "it doesn't work" in order to help you.
What URL did you use for canonical URLs ? What are the aliases that you set ?
What error did you get ? What were the links on the frontend ?
You have the same canonical URL for your two elements and you have to understand that HikaShop do not override the Joomla routing system so you can't use any URL you want for the canonical, the URL and you need to use an URL which can work, which can be routed by Joomla to HikaShop.
Regards,