HarmonyOS鸿蒙Next preferences:15500000

HarmonyOS鸿蒙Next preferences:15500000 我在使用首选项的时候，项目报错：15500000，这个有什么排查思路嘛？代码如下：

class PreferencesUtil {
  private context = getContext();
  private preferences?: dataPreferences.Preferences;

  private initPreferences() {
    try {
      let options: dataPreferences.Options = { name: PREFERENCES_NAME };
      this.preferences = dataPreferences.getPreferencesSync(this.context, options)
      console.debug(TAG + `Preferences初始化成功！this.preferences = ` + this.preferences)
    } catch (err) {
      console.error(TAG + "Failed to get preferences. code =" + err.code + ", message =" + err.message);
    }
  }

  private checkInit() {
    if (!this.preferences) {
      console.debug(TAG + `get Preferences尚未初始化！`)
      this.initPreferences()
    }
  }

  put(key: string, value: dataPreferences.ValueType) {
    this.checkInit()

    try {
      // 写入数据
      this.preferences!! .putSync(key, value)
      // 刷盘
      this.preferences!! .flush()
      console.debug(TAG + `保存Preferences[${key} = ${value}]成功`)
    } catch (e) {
      console.debug(TAG + `保存Preferences[${key} = ${value}]失败`, JSON.stringify(e))
    }
  }

  get(key: string, defaultValue: dataPreferences.ValueType): dataPreferences.ValueType {
    this.checkInit()

    try {
      // 读数据
      let value = this.preferences!! .getSync(key, defaultValue)
      console.debug(TAG + `读取Preferences[${key} = ${value}]成功`)
      return value
    } catch (e) {
      console.debug(TAG + `读取Preferences[${key}]失败`, JSON.stringify(e))
      return defaultValue
    }
  }

  contains(key: string): boolean {
    return this.preferences!! .hasSync(key);
  }

  delete(key: string) {
    this.checkInit()

    this.preferences!! .deleteSync(key)
    this.preferences!! .flush()

  }

  clear() {
    this.checkInit()

    this.preferences!! .clearSync()
    this.preferences!! .flush()
  }
}