Fixes #5144 When the response being dispatched is an array, `var_export` it instead of `echo`

core/dispatch.php

@@ -33,7 +33,9 @@ if (PIWIK_ENABLE_DISPATCH) {
     $controller->init();
     $response = $controller->dispatch();
 
-    if (!is_null($response)) {
+    if(is_array($response)) {
+        var_export($response);
+    } elseif (!is_null($response)) {
         echo $response;
     }
 }