Just tried installing Community Builder component (membership management) into my Joomla based web site but it fails at the first hurdle. Basically the plugins zip file fails to unzip. The http://www.joomlapolis.com site forum (Community builders home site) suggests that it is an ownership and permissions problem.
Ask your hoster about files ownership and permissions...hope he knows about it, since it seems not configured fine...
Is there a way to 'bulk set' ownership & permissions? (CRON perhaps??) I've noticed that some other components don't behave correctly so I think the site could do with a spring clean maybe. I've just tried loading CB into another site on a different Plesk server and the same error occurs. Help Andy