Translation:If you want to have the visa, you need to go to the embassy of that country.
Duo is also confused on this point. It very frequently requires "the" when no English speaker would use it.
In quite a few sentences, "đến" means both "come" and "go" and both are accepted. Except this one. One of the aspects of this course that is as clear as a black bear at midnight.
Terrible English translation. Which proves that it is frustrating and inefficient to learn a language through translation only.