There could be several reasons for absent responses when utilizing Quarkus REST Client Reactive with Mutiny:
- The server is down or unreachable.
- The request is blocked by a firewall or other security measures.
- The request is being throttled or rate-limited by the server.
- The request is malformed or missing required parameters.
- There are network or connectivity issues causing the request to fail.
- There are errors in the code or configuration of the client or server that are preventing successful communication.