Error at adding a new address on site demo.virtocommerce.com

[blazemachine]

New address is not saving. This problem has a bind with contactId field in JSON (maybe).
POST to https://demo.virtocommerce.com/Electronics/en-US/storefrontapi/account/addresses returns bad request (400).
Steps for reproduce:

1. Log in
2. Move to your account.
3. Try to create a new address.
4. Check Network with XHR filter and watch. Also, the error can appear on site.