Why did the 1s exchange with the site stop working?

Question

1C-Bitrix

Background, hosting was bought, a domain was created in it, 1c Bitrix was uploaded, a free domain name was attached, an exchange was set up with 1c UT, everything worked well. The development was completed, and tonight at the main domain, I indicated the ip record of the server in A, everything is fine, the site opens from the domain, but 1c stopped making the exchange, when I try to execute I get this error
The whole day of Google did not lead to success, where someone can dig already there was a similar, help pliiiz .. Or at least in which direction to "dig"?

Answer 1

define("BX_CRONTAB_SUPPORT", true); - it put my unload