In the example code of a plugin the src/i18n/locales/enObj.tsx is filled with an object. Because I did not required the object i made it undefined but this will throw an exception which crashes the plugin boot.
The code which wil crash the plugin
export const enObj: I18nObjects | undefined = undefined;
Code as work arround
export const enObj: I18nObjects = {
  defaultData: [
  ],
};