resolves #2738
@ -249,7 +249,7 @@ export class ConfigState {
if (index < 0) return;
const parent = flattedRoutes[index];
if (parent.url.replace('/', '')) {
if ((parent.url || '').replace('/', '')) {
route.url = `${parent.url}/${route.path}`;
} else {
route.url = `/${route.path}`;