diff --git a/npm/ng-packs/packages/core/src/lib/guards/auth.guard.ts b/npm/ng-packs/packages/core/src/lib/guards/auth.guard.ts
index 1e9dc52bb3..e799eb6784 100644
--- a/npm/ng-packs/packages/core/src/lib/guards/auth.guard.ts
+++ b/npm/ng-packs/packages/core/src/lib/guards/auth.guard.ts
@@ -26,6 +26,7 @@ export class AuthGuard implements CanActivate {
       return hasValidAccessToken;
     }
 
-    return router.createUrlTree(['/account/login'], { state: { redirectUrl: state.url } });
+    router.navigate(['/account/login'], { state: { redirectUrl: state.url } });
+    return true;
   }
 }
diff --git a/npm/ng-packs/packages/core/src/lib/tests/auth.guard.spec.ts b/npm/ng-packs/packages/core/src/lib/tests/auth.guard.spec.ts
index 93339bcbcc..1e7f5bf585 100644
--- a/npm/ng-packs/packages/core/src/lib/tests/auth.guard.spec.ts
+++ b/npm/ng-packs/packages/core/src/lib/tests/auth.guard.spec.ts
@@ -10,7 +10,7 @@ describe('AuthGuard', () => {
   let guard: AuthGuard;
   const createService = createServiceFactory({
     service: AuthGuard,
-    mocks: [OAuthService],
+    mocks: [OAuthService, Router],
     imports: [RouterModule.forRoot([{ path: '', component: RouterOutletComponent }])],
     declarations: [RouterOutletComponent],
     providers: [{ provide: APP_BASE_HREF, useValue: '/' }],
@@ -26,10 +26,13 @@ describe('AuthGuard', () => {
     expect(guard.canActivate(null, null)).toBe(true);
   });
 
-  it('should return url tree when user not logged in', () => {
+  it('should return navigate to login page with redirectUrl state', () => {
     const router = spectator.get(Router);
-    const expectedUrlTree = router.createUrlTree(['/account/login'], { state: { redirectUrl: '/' } });
     spectator.get(OAuthService).hasValidAccessToken.andReturn(false);
-    expect(guard.canActivate(null, { url: '/' } as any) as UrlTree).toEqual(expectedUrlTree);
+
+    expect(guard.canActivate(null, { url: '/' } as any)).toBe(true);
+    expect(router.navigate).toHaveBeenCalledWith(['/account/login'], {
+      state: { redirectUrl: '/' },
+    });
   });
 });
diff --git a/npm/ng-packs/packages/theme-shared/src/lib/handlers/error.handler.ts b/npm/ng-packs/packages/theme-shared/src/lib/handlers/error.handler.ts
index f1ae22f3ae..af2db977fe 100644
--- a/npm/ng-packs/packages/theme-shared/src/lib/handlers/error.handler.ts
+++ b/npm/ng-packs/packages/theme-shared/src/lib/handlers/error.handler.ts
@@ -90,7 +90,7 @@ export class ErrorHandler {
       .subscribe(err => {
         const body = snq(() => err.error.error, DEFAULT_ERROR_MESSAGES.defaultError.title);
 
-        if (err.headers.get('_AbpErrorFormat')) {
+        if (err instanceof HttpErrorResponse && err.headers.get('_AbpErrorFormat')) {
           const confirmation$ = this.showError(null, null, body);
 
           if (err.status === 401) {