WordPress Error 400

The 400 Bad Request response is a catch-all for when your server experiences a client error, but it doesn’t fall into a specific category. 

That means this error has several possible causes, including:

  • An incorrectly-typed URL or one that contains disallowed characters.
  • Corrupted browser caches or cookies.
  • Discrepancies between Domain Name System (DNS) data and your local DNS cache.
  • Trying to upload a file that is too large.
  • Some kind of general server error.

Potential solutions include checking the URL for typos, clearing your browser cache and cookies, clearing your DNS cache, and deactivating browser extensions.

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