Unable to connect to crewai project api deployed in crewai studio

I am trying to connect to a crewai api using a url and a bearer token of a project deployed in crewai studio and get this error: HTTP Response Code: 503
Response from CrewAI: Error: 503 - Service Temporarily Unavailable.
Why is the service seems to be unavailable for a long time? I am connecting from netbeans IDE with java programming language.