Kerberos Authentication is not supported with REST Connector. The only workaround is not to use Kerberos Authentication.
In addition, the License and Operation Monitoring Apps will not reload anymore if using Kerberos. When trying to Reload them, the following error is observed:
Error: QVX_UNEXPECTED_END_OF_DATA: HTTP protocol error 401 (Unauthorized): 'Negotiate' authentication schema provided by the web-service is not supported or your credentials are not valid.
The reload of monitoring apps fails if Kerberos Authentication is enabled. The Kerberos authentication is not currently supported by the REST connector.
Resolution
You have two options on how to address this. Either you swap to JWT Authentication for the Monitoring Apps or disable Kerberos entirely.
I've clarified the article a little and hope that the new phrasing will prevent confusion in the future. And, thank you again! Your feedback and your raising this was very valuable.