Failed to retrieve extension data.Server not responding site

Hello vmassol,
I have the same issue. The following appears in Chrome console:
Mixed Content: The page at ‘Вход - ТоМесто’ was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint ‘Вход - ТоМесто’. This request has been blocked; the content must be served over HTTPS.

Could you please advise what to do with that?