unexpected end of JSON input

[logust79]

First of all, this project looks amazing! Thanks for all the good work.

However, I have this error when trying to visualise an example chart. When I pull up the console, I see this:
POST http://localhost:5173/api/vizchat 404 (Not Found)
Perhaps I have to run vizchat as a server in a separate instance?

[ObservedObserver]

Try ‘vercel dev’, which runs both the api and front-end together.

[logust79]

That works. Thank you!

[PFbHzsiF]

After a few try and error, the vercel dev is working. But I still get a different version of JSON error when click visualize.

Unexpected token 'F', "FetchError"... is not valid JSON

If I use npm run dev, I will get Unexpected end of JSON input or JSON.parse: unexpected end of data at line 1 column 1 of the JSON data.

This is really a great project. But I don't seems to have enough ability to selfhost it at this stage.

Would you mind give me a little bit more guide of how to solve these JSON errors?
And are you considering provide an official dockerfile like Rath project do?