First try to upgrade perl this is the main reason for a cpanel error. http://www.ezlinuxadmin.com/2009/08/upgrading-perl-on-cpanel/ After that if you still have a issue run this: /scripts/perlinstaller –force YAML::Syck or Install the YAML::Syck perl module in whm under module installers.

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wget http://layer1.cpanel.net/perl588installer.tar.gz tar xfvz perl588installer.tar.gz cd perl588installer ./install /usr/local/cpanel/bin/checkperlmodules

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