Azure Devops service 2019 can't export to excel

[zhangwk02]

GET https://dev.vankeservice.com/Example/HelloDevOps/_apis/test/Plans/46393/Suites/57194/Points?witFields=System.Title 400 (Bad Request)

{"$id":"1","innerException":null,"message":"TF51535: 找不到字段 Title。","typeName":"Microsoft.TeamFoundation.WorkItemTracking.Server.Metadata.WorkItemTrackingFieldDefinitionNotFoundException, Microsoft.TeamFoundation.WorkItemTracking.Server","typeKey":"WorkItemTrackingFieldDefinitionNotFoundException","errorCode":0,"eventId":3200}

POST https://dev.vankeservice.com/Example/_apis/ClientTrace/Events 401 (Unauthorized)
oteTab.html:1 Access to XMLHttpRequest at 'https://dev.vankeservice.com/Example/_apis/ClientTrace/Events' from origin 'null' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.