Hi Marianne! Thanks for the question. Our officially supported embedded Timeline widgets are described in our Twitter for Websites documentation, and we have an official Wordpress plugin as well. They are designed to be simple to use and require minimal effort to implement.
The Twitter-Post-Fetcher tool that you are using is not using the supported Twitter API, so we can’t recommend it, or help you out. If you really need to use that, you’d have to raise your question with the author.
Good luck!
