I get error message not valid json file and 502 bad gatway

Check the error message

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502 bad gateway

As the error says, your JSON file isn’t valid, but the screenshot doesn’t show the whole file.

Are you able to share the file here?

The problem is the comma after “Direct”.

I get error message

I see there’s a 502 error. What have you done so far to troubleshoot it?

It’s better in help forums to paste text than screenshots of text.

When an app isn’t working, a first step is to check the app logs. In this case:

 systemctl status ‘*ghost*’

You can also try

ghost doctor