Chatbot Not Responding: Colab FastAPI + Flask + Ngrok Setup

May 21, 2025 · 4 min read · I'm setting up a chatbot where the language model runs on Google Colab (FastAPI exposed via Ngrok), and a local Flask app serves the HTML frontend, acting as a proxy. The Ngrok tunnel for the Colab FastAPI appears to be running, but the chatbot isn't...