Not able to hit api with the URL provided by tyk

hi,

i am using tyk on-premise, i have added an api to tyk and got the url something like this:
https://tyk.on.premise.com/auth-controller/

i am not able to hit the api with the URL mentioned above but i am able to hit the api with the ip:portname of the instance where i have installed tyk.

can anyone please help, how can i resolve this ?