The ranked season in League of Legends was expected to begin on Jan. 10 to 11 worldwide, depending on the region. But the servers seem to have gone down in North America just as it was scheduled to begin.
It appears that the NA League servers are offline due to maintenance. It should be completed by 9am CT, according to League of Legends‘ service status page. There are no details explaining why the servers had to be turned off ahead of the 2023 ranked season, however.