What does it mean Request Entity Too Large?

A 413 Request Entity Too Large error occurs when a request made from a client is too large to be processed by the web server. … An example request, that may cause this error would be if a client was trying to upload a large file to the server (e.g. a large media file).

For More Information Please Refer: https://www.keycdn.com/support/413-request-entity-too-large