What is this incomprehensible window on the Vkontakte login form?

Question

Opera

Greetings, tell me, an incomprehensible window with accounts on the Vkontakte login form began to appear, maybe someone has come across this and knows where it comes from, please respond, thanks!
Windows 10 pro system, Opera browser 49
ps On other pages in forms, this is not the case and in other browsers too. This was not the case before.
If you have the latest version of Opera, please check and write if you have it)

Answer 1

most likely the usual memorizer of passwords in the opera.

Answer 2

The dialog box shown in the picture sends the site. Others have a standard Windows dialog.

This was not the case before.

The version of OPERA has changed, or VK began to define it differently, or something else ... Question for VK support.