The following error appears when I click on “Websites” in “Settings”.
Url: piwik/index.php?module=SitesManager&action=index&idSite=1&period=day&date=yesterday
Notice: Undefined index: excluded_user_agents in /var/www/vhosts/****/httpdocs/piwik/plugins/SitesManager/Controller.php on line 43
Backtrace -->
#0 Piwik_ErrorHandler(...) called at [/var/www/vhosts/***/httpdocs/piwik/plugins/SitesManager/Controller.php:43]
#1 Piwik_SitesManager_Controller->index(...) called at [:]
#2 call_user_func_array(...) called at [/var/www/vhosts/***/httpdocs/piwik/core/FrontController.php:138]
#3 Piwik_FrontController->dispatch(...) called at [/var/www/vhosts/***/httpdocs/piwik/index.php:53]
Thanks for your help.