Added return after 404 redirect.

src/router/index.js

@@ -46,6 +46,7 @@ const routes = [
             if (getISSCookie() !== null && !isSavedSessionStillActive()) {
                 // await baseMixin.methods.dispatchStoreAction(storeActions.RESET_STATE);
                 await GoToStartOn404(next);
+                return null;
             }
 
             // Process ISS cookie.
@@ -66,6 +67,7 @@ const routes = [
 
                 if (!arePagePrerequisitesValid(component)) {
                     await GoToStartOn404(next);
+                    return null;
                 }
 
                 return next({name: issPageToUse, query: to.query, params: to.params, state: to.state});
@@ -123,6 +125,7 @@ const routes = [
                 const tempMsgCopy = 'Pre Requisites failed, need to handle.  Default is Welcome Page.';
                 const tempMsgHeadline = `${issPageToUse}: pre-req failed...`;
                 await GoToStartOn404(next, tempMsgCopy, tempMsgHeadline);
+                return null;
             }
 
             // Assign current query string parameters, as well as our issPage one.