fix: various type issues and error handlings (#2831)

* fix(error):Fix a few error conditions, mostly around seriesNumber

* apply few fixes

platform/viewer/src/components/ViewportGrid.tsx

@@ -370,8 +370,9 @@ function _getViewportComponent(displaySets, viewportComponents) {
   const SOPClassHandlerId = displaySets[0].SOPClassHandlerId;
 
   for (let i = 0; i < viewportComponents.length; i++) {
-    if (!viewportComponents[i])
+    if (!viewportComponents[i]) {
       throw new Error('viewport components not defined');
+    }
     if (!viewportComponents[i].displaySetsToDisplay) {
       throw new Error('displaySetsToDisplay is null');
     }