Unsupported content type: text/plain API collection issue

Hello, I’m consistently getting this error even though the API call is a success. I’ve tried putting the content-type: application/json into the header parameters and still having no luck.

Sorry for the novice question but thank you for your help!

Have you tried using content type: text/plain if that doesn’t work can you provide additional screenshots of the set up?

Hi Ashley, yes I just tried that with no luck.

On the endpoints tab, the results key for GET ALL is empty.