Calling an REST API

Hello, I am trying call an REST API and import the users into my application through GET HTTP Method,  when i use the dummy JSON Data, its working fine, but when I try to call an API that has Microsoft SQL Database, its not working. Its giving me an error on the UI Page saying "Contact your Administrator" , I have connected to Microsoft SQL through an External Database connector, but still its giving me the same error. I tried to run as an administrator as well. Nothing seem to work, I am stuck at this since days, please help. If possible explain with the steps please.
1 answers

image.pngThis is the error