Getting the above error in Constellation application when accessing Pega Knowledge Buddy (KB).
Double checked KB configuration and is as per requirement.
Pega Cloud lab instance recently provisioned so assuming its Pega Cloud 3.
When I test the KB in Pega Knowledge Buddy application it runs fine.
@Atanu Senif basic auth is working that points to the OAuth config not being correct as that is what KB is configured to ship with as the default. There are two main auth profiles used by KB, KnowledgeBuddy_OAuth_DataUser (Pegasystems Documentation) for ingestion and deletion, as well as KnowledgeBuddy_OAuth_EndUser (Pegasystems Documentation) for asking of questions. Please double check their configuration is correct and be sure to revert the KnowledgeBuddy service package back to use OAuth.