The fatal error: Neither the property "getRows" nor one of the methods "getRows()", "getgetRows()"/"isgetRows()" or "__call()" exist and have public access in class "Piwik\DataTable\Map". in plugins/CoreVisualizations/templates/_dataTableViz_htmlTable.twig line 21

Can be reproduced at https://demo.matomo.org/index.php?forceView=1&viewDataTable=..%2fWEB-INF%2fweb.xml%3bx%3d&module=MediaAnalytics&action=get&idSite=3&period=day&date=2018-10-16,2018-11-14&showtitle=1&random=84&columns=sum_total_time_watched&colors={%22backgroundColor%22%3A%22%23ffffff%22%2C%22lineColor%22%3A%22%23162c4a%22%2C%22minPointColor%22%3A%22%23ff7f7f%22%2C%22maxPointColor%22%3A%22%2375bf7c%22%2C%22lastPointColor%22%3A%22%2355aaff%22%2C%22fillColor%22%3A%22%23ffffff%22}

It is only triggered under edge case (ie. security scanner), but will be good to fix since we get this emailed to us quite a bit.