Service not started: it may be due to the Redis service not being started or already stopped.
Firewall settings: The firewall settings may prevent connections to the Redis server.
Network issue: The inability to connect to the Redis server may be due to a network problem.
Configuration error: It may be due to incorrect configuration information for connecting to the Redis server, such as the host name, port number, or password.
Configuration issues with the Redis server, such as incorrect IP bindings or port bindings, can also lead to connection errors.
Connection limit: The Redis server may have a limit on the number of connections, preventing connection.
Other issues: It could be other unknown problems that are preventing the connection to the Redis server.
