Why is not XMLHttpRequest() working?

I have a simple API generating json from Postgresql. It works sometimes, but not always.
What am I doing wrong?

**1. Using browser**
The json appear as it should when I paste the url in the browser: http://94.237.92.101:6061/users
`[{“usr_date”:”2020-06-01T00:00:00Z”,”usr_id”:4,”usr_mail”:”[email protected]”,”usr_name”:”James”,”usr_pw”:”5678″,”usr_sign”:”JB”,”usr_status”:0,”usr_token”:null},{“usr_date”:”2021-02-28T00:00:00Z”,”usr_id”:6,”usr_mail”:”[email protected]”,”usr_name”:”Doug”,”usr_pw”:”7890″,”usr_sign”:”DB”,”usr_status”:0,”usr_token”:null},{“usr_date”:”2020-06-01T00:00:00Z”,”usr_id”:3,”usr_mail”:”[email protected]”,”usr_name”:”Sibert”,”usr_pw”:”1234″,”usr_sign”:”SB”,”usr_status”:1,”usr_token”:null}]`

**2. Using Online API tool**
https://reqbin.com/ryo8ao79
https://gowebstatic.tk/img/online_apitest

**2. But not Using jsfiddle.net**
https://jsfiddle.net/xz07s6pf/