Not found couchbase class

My PHP Version 7.0.23

Here is my php info -

giving this error -:

Php sdk   -  Fatal error : Class Couchbase\PasswordAuthenticator not found in PHP

Your version is pretty old (2.2.0). You should install recent version to use authenticator:

Current version is 2.4.3

Thanks @avsej

But it gives now this error -

Fatal error: Uncaught Couchbase\Exception: LCB_ETIMEDOUT: Client-Side timeout exceeded for operation. Inspect network conditions or increase the timeout in C:\wamp64\www\couch.php on line 11

could you set INI couchbase.log_level = TRACE and show what it writes to the logs?