I m getting error when I log in (no replies)

Please check the following attachment it shows the following error when I log in


Warning: file_get_contents(): php_network_getaddresses: getaddrinfo failed: Name or service not known in /var/www/piwik/core/Http.php on line 406

Backtrace -->

#0 Piwik\Error::errorHandler(...) called at [:]
#1 file_get_contents(...) called at [/var/www/piwik/core/Http.php:406]
#2 Piwik\Http::sendHttpRequestBy(...) called at [/var/www/piwik/core/Http.php:94]
#3 Piwik\Http::sendHttpRequest(...) called at [/var/www/piwik/core/Http.php:720]
#4 Piwik\Http::fetchRemoteFile(...) called at [/var/www/piwik/plugins/ExampleRssWidget/RssRenderer.php:46]
#5 Piwik\Plugins\ExampleRssWidget\RssRenderer->get(...) called at [/var/www/piwik/plugins/ExampleRssWidget/Controller.php:25]
#6 Piwik\Plugins\ExampleRssWidget\Controller->rssPiwik(...) called at [:]
#7 call_user_func_array(...) called at [/var/www/piwik/core/FrontController.php:531]
#8 Piwik\FrontController->doDispatch(...) called at [/var/www/piwik/core/FrontController.php:84]
#9 Piwik\FrontController->dispatch(...) called at [/var/www/piwik/core/dispatch.php:34]
#10 require_once(...) called at [/var/www/piwik/index.php:47]


There is an error. Please report the message (Piwik 2.4.1) and full backtrace in the Piwik forums (please do a Search first as it might have been reported already!).

Warning: file_get_contents(http://feeds.feedburner.com/Piwik): failed to open stream: php_network_getaddresses: getaddrinfo failed: Name or service not known in /var/www/piwik/core/Http.php on line 406

Backtrace -->

#0 Piwik\Error::errorHandler(...) called at [:]
#1 file_get_contents(...) called at [/var/www/piwik/core/Http.php:406]
#2 Piwik\Http::sendHttpRequestBy(...) called at [/var/www/piwik/core/Http.php:94]
#3 Piwik\Http::sendHttpRequest(...) called at [/var/www/piwik/core/Http.php:720]
#4 Piwik\Http::fetchRemoteFile(...) called at [/var/www/piwik/plugins/ExampleRssWidget/RssRenderer.php:46]
#5 Piwik\Plugins\ExampleRssWidget\RssRenderer->get(...) called at [/var/www/piwik/plugins/ExampleRssWidget/Controller.php:25]
#6 Piwik\Plugins\ExampleRssWidget\Controller->rssPiwik(...) called at [:]
#7 call_user_func_array(...) called at [/var/www/piwik/core/FrontController.php:531]
#8 Piwik\FrontController->doDispatch(...) called at [/var/www/piwik/core/FrontController.php:84]
#9 Piwik\FrontController->dispatch(...) called at [/var/www/piwik/core/dispatch.php:34]
#10 require_once(...) called at [/var/www/piwik/index.php:47]