diff --git a/angular/src/app/services/wp-json.service.ts b/angular/src/app/services/wp-json.service.ts
index 20f973c..c45d237 100644
--- a/angular/src/app/services/wp-json.service.ts
+++ b/angular/src/app/services/wp-json.service.ts
@@ -45,7 +45,8 @@ export class WpJsonService {
   getCustomerInfo(systemId: string, token: string, url: string): Observable<any> {
     return this._request(`customer_info/${systemId}/${token}/`, 'GET', null, false, url).pipe(
       switchMap((response) => {
-        if (response?.customer_info?.errorCode !== 'Customer_CustomerNotFound') {
+				// TODO: typescript compile optional chaining ('response?.customer_info?.errorCode') without check ('response.customer_info.errorCode')
+        if (response && response.customer_info && response.customer_info.errorCode !== 'Customer_CustomerNotFound') {
           return of(response)
         } else {
           return this.newCustomer(systemId, token, url).pipe(