There is an error. Please report the message (Piwik 2.4.0-b7) and full backtrace in the Piwik forums (please do a Search first as it might have been reported already!).

Recoverable Error:
Argument 1 passed to Piwik\API\DataTableManipulator\ReportTotalsCalculator::hasDataTableMetric() must be an instance of Piwik\DataTable, instance of Piwik\DataTable\Map given, called in /home/matt/dev/piwik-master/core/API/DataTableManipulator/ReportTotalsCalculator.php on line 76 and defined in /home/matt/dev/piwik-master/core/API/DataTableManipulator/ReportTotalsCalculator.php on line 90

Backtrace -->

#0 Piwik\Error::errorHandler(...) called at [/home/matt/dev/piwik-master/core/API/DataTableManipulator/ReportTotalsCalculator.php:90]
#1 Piwik\API\DataTableManipulator\ReportTotalsCalculator->hasDataTableMetric(...) called at [/home/matt/dev/piwik-master/core/API/DataTableManipulator/ReportTotalsCalculator.php:76]
#2 Piwik\API\DataTableManipulator\ReportTotalsCalculator->manipulateDataTable(...) called at [/home/matt/dev/piwik-master/core/API/DataTableManipulator.php:67]
#3 Piwik\API\DataTableManipulator->manipulate(...) called at [/home/matt/dev/piwik-master/core/API/DataTableManipulator.php:83]
#4 Piwik\API\DataTableManipulator->manipulateDataTableMap(...) called at [/home/matt/dev/piwik-master/core/API/DataTableManipulator.php:65]
#5 Piwik\API\DataTableManipulator->manipulate(...) called at [/home/matt/dev/piwik-master/core/API/DataTableManipulator.php:83]
#6 Piwik\API\DataTableManipulator->manipulateDataTableMap(...) called at [/home/matt/dev/piwik-master/core/API/DataTableManipulator.php:65]
#7 Piwik\API\DataTableManipulator->manipulate(...) called at [/home/matt/dev/piwik-master/core/API/DataTableManipulator/ReportTotalsCalculator.php:45]
#8 Piwik\API\DataTableManipulator\ReportTotalsCalculator->calculate(...) called at [/home/matt/dev/piwik-master/core/API/ResponseBuilder.php:309]
#9 Piwik\API\ResponseBuilder->handleDataTable(...) called at [/home/matt/dev/piwik-master/core/API/ResponseBuilder.php:128]
#10 Piwik\API\ResponseBuilder->renderValue(...) called at [/home/matt/dev/piwik-master/core/API/ResponseBuilder.php:76]
#11 Piwik\API\ResponseBuilder->getResponse(...) called at [/home/matt/dev/piwik-master/core/API/Request.php:217]
#12 Piwik\API\Request->process(...) called at [/home/matt/dev/piwik-master/plugins/API/API.php:560]
#13 Piwik\Plugins\API\API->getBulkRequest(...) called at [:]
#14 call_user_func_array(...) called at [/home/matt/dev/piwik-master/core/API/Proxy.php:209]
#15 Piwik\API\Proxy->call(...) called at [/home/matt/dev/piwik-master/core/API/Request.php:215]
#16 Piwik\API\Request->process(...) called at [/home/matt/dev/piwik-master/plugins/API/Controller.php:31]
#17 Piwik\Plugins\API\Controller->index(...) called at [:]
#18 call_user_func_array(...) called at [/home/matt/dev/piwik-master/core/FrontController.php:502]
#19 Piwik\FrontController->doDispatch(...) called at [/home/matt/dev/piwik-master/core/FrontController.php:83]
#20 Piwik\FrontController->dispatch(...) called at [/home/matt/dev/piwik-master/core/dispatch.php:34]
#21 require_once(...) called at [/home/matt/dev/piwik-master/index.php:47]