2876491 - Check Connection of destination with authentication type OAuth2SAMLBearerAssertion fails

When testing a destination with authentication type OAuth2SAMLBearerAssertion / OAuth2ClientCredentials / OAuth2UserTokenExchange in the SAP Cloud Platform Cockpit, the check fails with the following error:

Unexpected Token Service response code. Token Service error response: "The issuer of the received SAML2Assertion is not a trusted Identity Provider. There is no configuration for IdP '<region>.hana.ondemand.com/services'"

or

"Unexpected Token Service response code. Token Service error response: "Error determining metadata contracts". Check the configuration or contact Token Service owner." Received status code: "401"

or

Connection to XXX established. Response returned: "404: Not Found"

SAP Cloud Platform, Neo environment

scp hcp sap cp oauth oauth2 saml bearer OAuth2SAMLBearerAssertion, OAuth2UserTokenExchange, destination, OAuth2ClientCredentials, 404, 404 Not Found , KBA , BC-CP-DEST-NEO , Destination service for Neo environment , Problem