How to resolve the error: "Could not open websocket connection: websocket: could not find connection header with token 'upgrade'"

AuthorFullName__c
Loren Yeung
articleNumber
000003779
ft:sourceType
Salesforce
FirstPublishedDate
2017-05-03T22:33:52Z
lastModifiedDate
2023-01-22T11:05:33Z
VersionNumber
5