Node.js HTTP/2 통신에서 보고한 오류입니다. 세션·스트림 상태와 공식 설명을 확인하세요.
공식 설명 · 원문
Whenever an HTTP/2 SETTINGS frame is sent to a connected peer, the peer is required to send an acknowledgment that it has received and applied the new SETTINGS. By default, a maximum number of unacknowledged SETTINGS frames may be sent at any given time. This error code is used when that limit has been reached.