Hi, no, but I don't use latest version with this plugin. And on e107.sk I have just message No statistics available. But your problem is on line 1568
//before: $var = array('TOTAL' => $total,
$var = array('TOTAL' => number_format($total));
$text .= $tp->simpleParse($template['end'], $var);
Try to check what value is in $total (var_dump), and in $template['end'] . one of those params is missing. I am not able to test this (on localhost I haven't data yet).
And for sure create issue on github. And write your php version.