Bug fixed

renderer.php

@@ -126,7 +126,7 @@ class format_competencegraph_renderer extends format_section_renderer_base {
     public function print_nodes_graph($course, $sections, $mods, $modnames, $modnamesused) {
         echo '<script>';
 
-        echo 'var svgContainer = d3.select("#region-main").append("svg")
+        echo 'var svgContainer = d3.select("#maincontent").append("svg")
                 .attr("width", 800)
                 .attr("height", 1000);';