Troubleshooting and list of error codes

Working with errors

This section captures a list of common HTTP errors you might encounter and possible solutions to fix them.

HTTP Error Code	Error Text	Reason	Possible Fix
`HTTP 401`	Authorization Required	The credentials provided in the request was not sufficient for a successful authentication check.	To fix a failed authentication request, see the Authentication page.
`HTTP 403`	No access to reservation	Possible reasons are, you are trying to send updates: - for a reservation with the wrong reservation ID.< - for a reservation of a property which is no longer connected to your interface.	Make sure to specify the correct hotel ID or check your machine account credentials. You can then follow the steps: 1. Check if the property is connected to you in the Provider Portal. 2. Check if the connection status is active in the ‘Properties’ tab in the Provider Portal, using the property ID. 3. Check if the property is added to the machine account you use under ‘Machine Accounts’ in the Provider Portal. To know more about how to use the Provider Portal for the above actions, take a look at this self-help guide.
`HTTP 500`	Internal Server Error	Possible reason may be that Booking.com systems are experiencing temporary outage.	Try calling the endpoint after some time.