Got this error “An error has occured in the claim providers configured for this site collection” when trying to browse in People Picker?
So, I just go set the alternate access mapping. (Central Administration > Configure alternate access mappings, under Web Applications).
In my case, the Default url in the alternate access mapping collection is http://kelvin:966. So I add another Intranet URL, http://kelvin.vpc.cloud.com (I accessing using this FQDN).