Я перешёл по адресу, непредназначенному для перехода, и система мне пишет "failed to delete buffer zlib output compression". Что я делаю не так?

При переходе по ссылке

http://example.com/df-1c/cml2/

получаю -

Notice: ob_get_clean(): failed to delete buffer zlib output compression in /var/www/example.com/app/code/local/Df/1C/Model/Cml2/Action.php on line 82

#0 /var/www/example.com/app/code/local/Df/1C/Model/Cml2/Action.php(82): mageCoreErrorHandler(8, 'ob_get_clean():...', '/var/www/est...', 82, Array)
#1 /var/www/example.com/app/code/local/Df/1C/controllers/Cml2Controller.php(35): Df_1C_Model_Cml2_Action->process()
#2 /var/www/example.com/app/code/core/Mage/Core/Controller/Varien/Action.php(419): Df_1C_Cml2Controller->indexAction()
#3 /var/www/example.com/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('index')
#4 /var/www/example.com/app/code/community/ArtsOnIT/OfflineMaintenance/Controller/Router/Standard.php(46): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#5 /var/www/example.com/app/code/core/Mage/Core/Controller/Varien/Front.php(176): ArtsOnIT_OfflineMaintenance_Controller_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#6 /var/www/example.com/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#7 /var/www/example.com/app/Mage.php(683): Mage_Core_Model_App->run(Array)
#8 /var/www/example.com/index.php(87): Mage::run('', 'store')
#9 {main}

В каком конкретно пункте документации сказано переходить по данной ссылке?