failed to load resource: the server responded with a status of 431 (request header fields too large) code example

Example: failed to load resource: the server responded with a status of 431 (request header fields too large)

The HTTP 431 Request Header Fields Too Large response status code indicates that the server refuses to process the request because the request's HTTP headers are too long. ... 431 can be used when the total size of request headers is too large, or when a single header field is too large