VK has changed their domains for API integration and now recommends using vk.ru instead of vk.com.

This change is described in the official VK ID Web SDK release notes:
RELEASE 2.6.1 (10-09-2025)
https://id.vk.com/about/business/go/docs/en/vkid/latest/vk-id/release-notes#Izmeneniya-Web-VK-ID-SDK