How do I request using GET to external API?

You might have a CORS issue. My understanding is that access control allow origin is set on the server, not in a request. That's like going to a door that is locked to keep out strangers and a stranger walking up and asking to have the door unlocked.

Or slight possibility your text object is not large enough to fit the text as a single line so it doesn't show it.

Browsers block cross origin requests by default. So unless your game is hosted in the same domain as the API, any requests will be blocked. The easiest thing to do is add this header in the response the server gives for the resource.

Access-Control-Allow-Origin: *

Access-Control-Allow-Origin: https://my.game