From forum post:
Fatal error: Call to undefined method Piwik_DataTable_Array::getRows() in /stats/plugins/Actions/API.php on line 127
This is similar to #1125
The solution involves maybe creating a helper or somehow ensuring that the filters understand that reports are grouped by Date.
Another report of probably similar bug (to check!) in the forum:
method=Actions.getPageTitles idSite=1 period=week date=today filter_sort_order=desc filter_limit=15 format=JSON token_auth=$tkn But, if you change date to keyword 'last4', it gives the following error: "Column avg_time_on_page already in the array!"
(In ) Refs #2133 Ensuring no error is thrown, but not dealing with the issue itself as unfortunately there is no easy way to do so