diff --git a/includes/GlModelViewer.php b/includes/GlModelViewer.php
index 369fae9..6a73aad 100644
--- a/includes/GlModelViewer.php
+++ b/includes/GlModelViewer.php
@@ -64,7 +64,7 @@ class GlModelViewer extends ImageHandler {
     $metadata = json_decode($modelDescript[1], true);
     if (isset($frameParams['class'])) {
       preg_match('/view-(\S*)/',$frameParams['class'],$viewClassExtract);
-      $viewClass = $viewClassExtract[1];
+      $viewClass = ($viewClassExtract[1]) ? $viewClassExtract[1] : 'default';
     } else {
       $viewClass = 'default';
     }
@@ -84,7 +84,11 @@ class GlModelViewer extends ImageHandler {
         array_push($hotspots, $elHotspot);
       }
     }
-    $attrModelView = $metadata['viewerConfig'][$viewClass];
+    if (isset($metadata['viewerConfig']) && isset($metadata['viewerConfig'][$viewClass])) {
+      $attrModelView = $metadata['viewerConfig'][$viewClass];
+    } else {
+      $attrModelView = array('camera-controls' => true);
+    }
     $attrModelView = array_merge(['src' => $srcUrl, 'class' => 'mv-model', 'interpolation-decay' => '100'], $attrModelView);
     $attrModelView['style'] = 'width: 100%; height: 100%; min-height: 400px;';
     $elModel = Html::rawElement('model-viewer', $attrModelView, implode($hotspots));