Invalid hostname

[AnthonyNoel]

Hello, I'm using your hosted version and we're getting an invalid hostname error since 2023-06-22 (around midday GMT) when we try and use the json file as a feed in Klaviyo (our email email marketing service, we use the the tool to populate sheet content into an email template).

The json feed still opens in the browser.

When I try the URL in an alternative service (https://codebeautify.org/jsonvalidator), this also returns an error with some more details:

Parse error on line 1:
The URL you entered 
^
Expecting 'STRING', 'NUMBER', 'NULL', 'TRUE', 'FALSE', '{', '[', got 'undefined'

These are the URLs I'm testing, one is our own and one is the example from your site. They both return the same error.

https://gsx2json.com/api?id=1EKVHceINR0lxLuSxEyQ8Ws0J043qnjRo1TSojJ7ExpM&sheet=Section1&api_key=AIzaSyBxIOxT-oakGgVBJ3eShluroMRIv3GnCKw
https://gsx2json.com/api?id=1I3tEfgYtWKNYK9vqTmsCGfZfbHckS0-odDIgEilHiOQ&sheet=Sheet1