Fatal error: Uncaught Error: Class 'Piwik\Plugin\Visualization' not found in /home/empamtph/cevida/analitic/plugins/ExampleVisualization/Visualizations/SimpleTable.php:19 Stack trace: #0 {main} thrown in /home/empamtph/cevida/analitic/plugins/ExampleVisualization/Visualizations/SimpleTable.php on line 19