Notice: Undefined index: response ......plugins/KeywordTracking/API.php on line 225

Can Someone please help? This error appears only under the Keyword Summary tab in the dashboard and only in one site. The piwik code is already in the body of the site. Clicking the Keyword Tracking tab shows only “ring the request, please try again”

(Piwik 1.12)

Notice: Undefined index: response in /var/www/vhosts/ on line 225

Backtrace -->

#0 Piwik_ErrorHandler(…) called at [/var/www/vhosts/]
#1 Piwik_KeywordTracking_API->getAllReportId(…) called at [/var/www/vhosts/]
#2 Piwik_KeywordTracking_Controller->summary(…) called at [:]
#3 call_user_func_array(…) called at [/var/www/vhosts/]
#4 Piwik_FrontController->dispatch(…) called at [/var/www/vhosts/]

The plugin KeywordTracking is not in the marketplace nor did we create it. Maybe you can contact the developer of the plugin and ask him to publish on the marketplace? Distributing Your Plugin: Develop - Matomo Analytics (formerly Piwik Analytics) - Developer Docs - v3