SymptomsParallels Plesk Sitebuilder is registered in Parallels Plesk Panel version 9.
I get the error Error: Sitebuilder is switched off when try to open domain in Sitebuilder wizard through:
Home -> Client Accounts -> CLIENT -> mark domain -> Finish
CauseSitebuilder support is disabled for the domain you are trying to open for editing in Sitebuilder.
ResolutionYou should enable Sitebuilder support for the domain.
Use instructions from the following article for details about how to enable: http://kb.parallels.com/en/5907.
If Sitebuilder license key has limit to maximum number if hosts refer to article http://kb.sp.parallels.com/en/5477.