Impossible to connect to a custom bitbucket site via official vscode extension

[Чернов Василий Михайлович]

I am trying to add a custom bitbucket site to vscode via official Atlassian extension following these instructions below
https://support.atlassian.com/bitbucket-cloud/docs/get-started-with-vs-code/
https://confluence.atlassian.com/bitbucketserver063/personal-access-tokens-972354166.html
I filled out all three inputs but the "save site" button does not do anything.

I also tried to use a certificate, since it is necessary for our bitbucket site, but the result is same. All inputs are outlined red and save site button isn't working at atll..

Is it a bug, or should I do some extra steps in order to connect?