fix: public download

src/app/shared/services/download.service.ts

@@ -36,9 +36,11 @@ export class DownloadService {
     });
 
     const requestHeaders: HeadersInit = new Headers();
-    const token = this.oauth2Service.getAccessToken();
     requestHeaders.set("Content-Type", "application/json");
-    requestHeaders.set("Authorization", "Bearer " + token);
+    const token = this.oauth2Service.getAccessToken();
+    if (!isNullOrUndefined(token)) {
+      requestHeaders.set("Authorization", "Bearer " + token);
+    }
 
     return from(
       fetch(url, {