Common error messages

The following table describes the errors you might encounter, and their common fixes:

Error Code	Description	Common fix
400	Incorrect request. The server received a request it couldn’t understand. Often caused by typos, invalid characters, or improper syntax.	Check your request for errors and try again.
401	Unauthorized.	The request lacked valid authentication. Often caused if the wrong authentication type is given with the request.
403	Forbidden. Often caused if you don’t have the required access. This is typically due to admin rights.	Make sure you have admin status and that you are signed up to the relevant Trustpilot plan.
404	The server couldn’t find what you asked for. Often caused by an incorrect URL (a base URL that isn’t api.trustpilot.com or invitations-api.trustpilot.com) or missing resource, for example; you’re searching for a consumer that does not exist.	Check your URL for typos, invalid characters or improper syntax.
415	Unsupported media type.	Make sure that you’ve used the correct Content-Type in your header.
500	Server error.	Try again in 5-15 minutes.
501	Request not supported. There’s no implementation for your request on the server yet.	If there’s a specific feature that you want to use, ask your Customer Success Manager when implementation on the server is expected.