How to fix " Uncaught TypeError: Argument 1 passed to JpGraphException::defaultHandler() " problem in php 7.1.3 and jpgraph 4.2.6?

php html mysql jpgraph

PHP Snippet 1:

$p1 = new PiePlot3D($data);
$graph->Add($p1);  // this is where the change is
$p1->ShowBorder();
$p1->SetColor("green");
$p1->ExplodeSlice(1);
$graph->Stroke();