HarmonyOS 使用AppStartup，运行时异常

使用StartupConfigEntry中的StartupListener.onCompleted来监听任务完成情况，报以下错误

错误msg：NetworkStartup: startup task is null or context is null.

错误code：16000050

参考链接：https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/app-startup-V5

export default class HPStartupConfigEntry extends StartupConfigEntry {
  onConfig() {
    let onCompletedCallback = (error: BusinessError<void>) => {
      hilog.info(0x0000, 'testTag', `onCompletedCallback`);
      if (error) {
        hilog.info(0x0000, 'testTag', 'onCompletedCallback: %{public}d, message: %{public}s', error.code,
          error.message);
      } else {
        hilog.info(0x0000, 'testTag', `onCompletedCallback: success.`);
      }
    };
    let startupListener: StartupListener = {
      'onCompleted': onCompletedCallback
    };
    let config: StartupConfig = {
      'timeoutMs': 10000,
      'startupListener': startupListener
    };
    return config;
  }
}
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