A widespread issue with server overload has caused a significant number of websites to go down worldwide. The problem occurs when too many users try to access the same site at the same time, overwhelming its capacity.
The ‘429 Too Many Requests’ error message is often displayed when this happens, indicating that the website cannot handle the current load and requests a temporary halt before resuming service.
In response to this issue, web administrators have been advised to take steps such as optimizing server performance, limiting concurrent connections, and implementing rate limiting measures.
Source: https://www.cbssports.com/nfl/news/nfl-divisional-round-playoff-overreactions-bills-finally-beating-chiefs-commanders-primed-to-upset-eagles