Problems installing solarium-cloud

[dmantovani]

After install all the package, get the follow error:

Fatal error: Class 'Solarium\Cloud\Core\Client\Request' not found in /home/buffalo/public_html/scripts/autopartes/hoosk/hoosk0/libraries/solarium-cloud/src/Solarium/Cloud/Core/Client/AdminRequest.php on line 39
A PHP Error was encountered
Severity: Error
Message: Class 'Solarium\Cloud\Core\Client\Request' not found
Filename: Client/AdminRequest.php
Line Number: 39
Backtrace:

Can you help me please?