Internal error: Failed to connect to sitebuilder

[WesleyG]

Internal error: Failed to connect to sitebuilder - missing or incorrect C:\Program Files (x86)\Parallels\Plesk\/sb/include/init.php
Message Failed to connect to sitebuilder - missing or incorrect C:\Program Files (x86)\Parallels\Plesk\/sb/include/init.php
File Connector.php
Line 19
Type Sitebuilder_Exception
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Any ideas???

Thanks in advance