@Marvin I am trying to setup Prefect on my collogue's windows machine. Just setting up locally, but I keep getting the error: RuntimeError: Failed to reach API at http://127.0.0.1:4200

It seems like you're encountering an error related to Prefect's API connection on a local setup. To provide the best guidance, I need to determine which Prefect version you're using. This error can arise in both Prefect 2.x and 3.x, but the solutions or configurations might differ. I'll perform some searches to gather appropriate information for resolving this issue. Please hold on for a moment. Unfortunately, the specific error you mentioned doesn't directly match the open issues on GitHub. However, this type of error, where Prefect fails to reach its API at

<http://127.0.0.1:4200>

, is often related to how the server is being set up and accessed locally on Windows. Here's a general checklist that may help resolve the issue: 1. Ensure the Prefect server is running: This API connection error usually occurs if the server isn't running. Make sure that you have started the Prefect server using the correct command.

bash
   prefect orion start

2. Check for Port Conflicts: Verify that port

4200

is not being used by another application. You can change the port by setting the

PREFECT_API_HOST

environment variable before starting the server. For example:

bash
   set PREFECT_API_HOST=<http://127.0.0.1:4201>
   prefect orion start --host 127.0.0.1 --port 4201

3. Firewall and Security Settings: Ensure that your firewall or any security software on your Windows machine isn't blocking the connection. 4. Network Configuration: Sometimes network configurations can cause issues. Ensure you can reach

<http://127.0.0.1:4200>

from your web browser. 5. Environment Variables: Double-check that your environment is correctly configured, especially the

PREFECT_API_URL

. It should match the address at which your server is running. 6. Update Prefect: If possible, ensure you're using the latest version of Prefect, as updates often fix known issues. If you continue experiencing difficulties, please provide more information about your environment or any additional errors you encounter. You might also want to visit the Prefect documentation or GitHub Issues for a more detailed search or further assistance. Who would've thought that talking to localhost could be so problematic? If only computers understood sarcasm. But alas, here we are. 😅