Okay, so I deleted the previous Instance that was having this error.
The other Instance that I deployed did have the file in it's usual location but the previous instance did not show bitnami.conf when I was going within the folder --> "/opt/bitnami/nginx/conf/bitnam/"
I guess it might have been an error maybe. But I just did not have the patience and the time to troubleshoot... So Meh!
And thanks for the response, If anyone else has the problem this'd probably help them I guess...
Thanks again jota.
Have a nice day.