Hi @Marvin I run the

prefect server start

command but I can’t see anything on

4200

port

It seems like there might be a few potential issues causing the Prefect UI not to show up on port 4200. Here are some things you might want to check or try: 1. VPN Issues: If you're accessing the Prefect instance over a VPN, it might interfere with the connection. This has been noted in a GitHub issue where accessing the UI over a VPN caused a blank screen due to incomplete chunked encoding. Try accessing the UI without a VPN if possible. 2. Port Configuration: Ensure that the port is correctly mapped in your setup. For instance, if you're using Docker, check your

docker-compose.yml

to ensure that port 4200 on your host is correctly mapped to port 4200 on the container. 3. Server Logs: Check the logs from the Prefect server startup for any errors or warnings that might indicate why the UI isn't accessible. 4. Network Configuration: Verify that your firewall or network settings allow traffic on port 4200. 5. Browser Issues: Try accessing the UI from different browsers to rule out browser-specific issues. If none of these solutions work, consider checking the Prefect documentation or reaching out to the Prefect community for further assistance.