COS’s web-based diagnostic tool allows you to troubleshoot error requests. You can enter the error
RequestId (see Obtaining RequestId) on the tool page and click Diagnose. The tool will check the request and provide basic information about the request as well as suggestions so that you can quickly troubleshoot COS API errors.
RequestId and click Diagnose.
Wait and view the diagnostic result.
The result includes the suggestions and the request information.
On the diagnostic tool page, you can also find the FAQs. If you have any queries, please contact us.