Change location does not work, no change

Hi there,

I get an issue with my website, when I want to use the menu change location button.

I chose a country, Belgium for example, and nothing does not happen. I will be redirect to this URL : http://mysite.com/location/

And if I am on a Post Type page, at this curious url:
http://mysite.com/custom-post-type/locationmysite.com/?page_id=8belgique

I don’t where is the problem, some iddea :
– I made a migrate and change url domain
– I did an CSV import

Do you know how could I fix it ?