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) {