The HTTP 400 status code means a server doesn’t want to process a request because of a client error.
It is a generic, catch-all status code that’s best used when there aren’t more descriptive status codes available.
Common causes of 400 Bad Request errors:
- malformed request body (payload)
- bad/malformed URL
- large request body, headers, or cookies (413 and 431 status codes would be more appropriate in those cases)
- invalid or expired cookie
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