Hey!
I can gladly help help here! When you are switching vectorizers you need to make sure the Module is also installed in your instance of Weaviate. If you are following the quickstart, then the part where you set up your docker-compose.yml, under the environment variables, you have ENABLE_MODULES here you would enable the modules you want to be able to access with your Weaviate Install. Do note any changes to your docker compose file will require you to restart the instance of Weaviate with the new compose file!
You can find also the available modules here: Vectorizers and Rerankers | Weaviate - Vector Database
I hope this helps get you past this error!
Regards!