This is the problem - the websites have not been loaded for 2 days already - error 522. I checked domains, hosting, dns. The site is connected and half a year worked fine - now 2 days is not working. I tried to disable the site and return it to the old DNS provider - the site immediately earned.
Thanks for the answer, yes you are right, as it turned out the lock appears on the level of the Internet provider, I replaced the provider and I have everything works!