[cluster_run] FTS UI is not working when N2N encryption is enabled

Only on cluster_run (and not with builds) - when node-to-node encryption is enabled the FTS UI just shows "unexpected server error". Authorized HTTP requests directly to FTS server are working, but HTTP requests going from the UI to the server are failing - I suspect the auth token that ns_server gives the FTS UI.

Whenever the UI sends a request to the FTS server (that reportedly fails), the server registers this error ..

2021/10/22 15:01:53 http: TLS handshake error from 127.0.0.1:59812: tls: failed to sign handshake: crypto/rsa: key size too small for PSS signature