Domain registration form step 5

Want to register a domain. In step 5, Billing, Administrative and Technical contacts selected but I can't select Owner. In this step Continue button inactive. Is there a problem or am I making a mistake.

Dear OVH, please add a note to your domain selling pages. That, you don't sell domains to non European countries. Because, if I change my country from my controll panel , this problem not occur anymore.

And Canada answered my question in one hour but, your Ireland branch don't answer support requests.