My attempt to update the plugins shows on the Web Log but nothing shows up on the error log… 🙁
[24/Feb/2016:19:25:57 +0100] “GET /Blog/wp-admin/update.php?action=update-sp-plugins&plugins=admin-bar%2Fsp-admin-bar-plugin.php%2Ccustom-profile-fields%2Fsp-custom-profile-fields-plugin.php%2Ctinymce-richtext%2Fsp-tinymce-plugin.php%2Cmaintenance%2Fsp-maintenance-plugin.php%2Cpolls%2Fsp-polls-plugin.php%2Cpost-preview%2Fsp-preview-plugin.php%2Cpost-rating%2Fsp-rating-plugin.php%2Cpost-thanks%2Fsp-thanks-plugin.php%2Cprivate-messaging%2Fsp-pm-plugin.php%2Cprofile-display-control%2Fsp-profile-display-control-plugin.php%2Crank-info%2Fsp-rank-info-plugin.php%2Cspam-registrations%2Fsp-spam-reg-plugin.php%2Cshare-this%2Fsp-share-this-plugin.php%2Csubscriptions%2Fsp-subscriptions-plugin.php%2Ctags%2Fsp-tags-plugin.php&_wpnonce=0949cf744b HTTP/1.1” 200 5754 “http://nekotsuki-studio.com/Blog/wp-admin/update-core.php?action=do-sp-plugin-upgrade” “Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.116 Safari/537.36”