Get Data from WEB returning Details: "We found extra characters at the end of JSON input."

Hi,

I am getting error on Unable to connect when I am tyring to Get Data from WEB (Basic URL: <Gerrit REST api url that I wanted to access to>).

And when I tried to validate the JSON format of my query, I noticed that there are some unexpected characters as shown below before the JSON content start.

)]}'
[
  [
    { <JSON CONTENT start here>

I am not sure whether is that the cause of why I am not able to get data from web successfully.

Would be great if anyone of you can teach me a way to get rid of the unwanted character so that I can use the get data from web feature.

Thanks. Looking forward for the recomendation.

Cheers.. Happy New Year in advance!~