Unity Remote Config FetchCompleted never gets called.

I wrote a simple script for unity remote config. The Awake method gets called but the OnDataFetched never gets called. My code:

 private void Awake() {
     print("get");
     //Looking for update
     ConfigManager.FetchCompleted += OnDataFetched;
     ConfigManager.FetchConfigs<UserAttributes, AppAttributes>(new UserAttributes(), new AppAttributes());
 }

 private void OnDisable() {
     ConfigManager.FetchCompleted -= OnDataFetched;
 }

 void OnDataFetched(ConfigResponse response) {
     print("got");

     string newestAppVersion = ConfigManager.appConfig.GetString("NewestVersion");
     if (newestAppVersion != Application.version) {
         versionNumberText.text = "Version: " + newestAppVersion;
         releaseNotesText.text = ConfigManager.appConfig.GetString("ReleaseNotes");
         updatePopup.SetActive(true);

         updateUrl = ConfigManager.appConfig.GetString("UpdateUrl");
     }
 }