Hey there @alexsender1965,
We’re only able to provide support in English, so I’ll be replying in English, but please continue writing in Russian if you prefer. We’ll use Google Translate to understand your replies.
I understand you’re experiencing an error when you try to load Jetpack > Dashboard. It looks like your site’s connection to the Jetpack plugin is currently broken, so we’ll want to get that resolved first and see if it clears up your dashboard error.
Jetpack communicates with your site via XML-RPC. When we try to communicate with your site, we are encountering the following error:
503 Service Unavailable
The server is temporarily busy, please try again later!
This particular error usually means that you are exhausting the available memory or resources on the site. If you get in touch with your web host and let them know you are encountering 503 errors, they should be able to check their server error logs and see what is going on.