Fatal error when creating report (no replies)

Hi there,

I have just installed piwik and i only use log import via python script. I import 15 days of data until 15th november

when i tried o generate an email report and tried to download it from the web interface, nothing happened and some logs appeared in PHP:

[28-Nov-2013 13:00:59 UTC] PHP Fatal error: Call to undefined method Piwik_DataTable_Array::getRows() in /PIWIK/core/ReportRenderer/Html.php on line 136
[29-Nov-2013 13:53:41 UTC] PHP Fatal error: Call to undefined method Piwik_DataTable_Array::getRows() in /PIWIK/plugins/MultiSites/API.php on line 256


I tried to generate daily, weekly and monthly report (because of data that does not exist from 15th november) and PDF or HTML report and nothing changed.

did someone have ever seen that? (lack of library?, bug?)

thx a lot

Emmanuel