Invalid argument supplied for foreach() (no replies)

Hi,

I have installed the Funnel pluggin on 19-sept (https://github.com/jesstelford/funnels)
I use Piwik v1.12.

But since i have installed the pluggin I get the following warnings when I retrieve results for a date most recent than 19-sept.

There is an error. Please report the message (Piwik 1.12) and full backtrace in the Piwik forums (please do a Search first as it might have been reported already!).

Warning: Invalid argument supplied for foreach() in /var/www/html/piwik/plugins/Funnels/Funnels.php on line 660 

Backtrace -->

#0 Piwik_ErrorHandler(...) called at [/var/www/html/piwik/plugins/Funnels/Funnels.php:660]
#1 Piwik_Funnels->storeRefAndNextUrls(...) called at [/var/www/html/piwik/plugins/Funnels/Funnels.php:320]
#2 Piwik_Funnels->archiveDay(...) called at [:]
#3 call_user_func_array(...) called at [/var/www/html/piwik/libs/Event/Dispatcher.php:284]
#4 Event_Dispatcher->postNotification(...) called at [/var/www/html/piwik/core/PluginsManager.php:674]
#5 Piwik_PostEvent(...) called at [/var/www/html/piwik/core/ArchiveProcessing/Day.php:43]
#6 Piwik_ArchiveProcessing_Day->compute(...) called at [/var/www/html/piwik/core/ArchiveProcessing.php:485]
#7 Piwik_ArchiveProcessing->launchArchiving(...) called at [/var/www/html/piwik/core/Archive/Single.php:223]
#8 Piwik_Archive_Single->prepareArchive(...) called at [/var/www/html/piwik/core/Archive/Single.php:251]
#9 Piwik_Archive_Single->get(...) called at [/var/www/html/piwik/core/Archive/Single.php:434]
#10 Piwik_Archive_Single->getNumeric(...) called at [/var/www/html/piwik/core/ArchiveProcessing/Period.php:90]
#11 Piwik_ArchiveProcessing_Period->archiveNumericValuesGeneral(...) called at [/var/www/html/piwik/core/ArchiveProcessing/Period.php:48]
#12 Piwik_ArchiveProcessing_Period->archiveNumericValuesSum(...) called at [/var/www/html/piwik/core/ArchiveProcessing/Period.php:290]
#13 Piwik_ArchiveProcessing_Period->isThereSomeVisits(...) called at [/var/www/html/piwik/core/ArchiveProcessing/Period.php:261]
#14 Piwik_ArchiveProcessing_Period->compute(...) called at [/var/www/html/piwik/core/ArchiveProcessing.php:485]
#15 Piwik_ArchiveProcessing->launchArchiving(...) called at [/var/www/html/piwik/core/Archive/Single.php:223]
#16 Piwik_Archive_Single->prepareArchive(...) called at [/var/www/html/piwik/core/Archive/Single.php:251]
#17 Piwik_Archive_Single->get(...) called at [/var/www/html/piwik/core/Archive/Single.php:434]
#18 Piwik_Archive_Single->getNumeric(...) called at [/var/www/html/piwik/core/ArchiveProcessing/Period.php:301]
#19 Piwik_ArchiveProcessing_Period->isThereSomeVisits(...) called at [/var/www/html/piwik/core/ArchiveProcessing/Period.php:261]
#20 Piwik_ArchiveProcessing_Period->compute(...) called at [/var/www/html/piwik/core/ArchiveProcessing.php:485]
#21 Piwik_ArchiveProcessing->launchArchiving(...) called at [/var/www/html/piwik/core/Archive/Single.php:223]
#22 Piwik_Archive_Single->prepareArchive(...) called at [/var/www/html/piwik/core/Archive/Single.php:251]
#23 Piwik_Archive_Single->get(...) called at [/var/www/html/piwik/core/Archive/Single.php:499]
#24 Piwik_Archive_Single->getDataTable(...) called at [/var/www/html/piwik/core/Archive.php:359]
#25 Piwik_Archive::getDataTableFromArchive(...) called at [/var/www/html/piwik/plugins/Actions/API.php:232]
#26 Piwik_Actions_API->getPageTitles(...) called at [:]
#27 call_user_func_array(...) called at [/var/www/html/piwik/core/API/Proxy.php:188]
#28 Piwik_API_Proxy->call(...) called at [/var/www/html/piwik/core/API/Request.php:145]
#29 Piwik_API_Request->process(...) called at [/var/www/html/piwik/core/ViewDataTable.php:423]
#30 Piwik_ViewDataTable->loadDataTableFromAPI(...) called at [/var/www/html/piwik/core/ViewDataTable/HtmlTable.php:79]
#31 Piwik_ViewDataTable_HtmlTable->main(...) called at [/var/www/html/piwik/plugins/Actions/Controller.php:475]
#32 Piwik_Actions_Controller->configureGenericViewActions(...) called at [/var/www/html/piwik/plugins/Actions/Controller.php:420]
#33 Piwik_Actions_Controller->configureViewActions(...) called at [/var/www/html/piwik/plugins/Actions/Controller.php:239]
#34 Piwik_Actions_Controller->getPageTitles(...) called at [/var/www/html/piwik/plugins/Actions/Controller.php:222]
#35 Piwik_Actions_Controller->indexPageTitles(...) called at [:]
#36 call_user_func_array(...) called at [/var/www/html/piwik/core/FrontController.php:125]
#37 Piwik_FrontController->dispatch(...) called at [/var/www/html/piwik/index.php:47]

Can you help please ?

Cheers,
Florian