A lot of countries require a visa to visit. Over the years the process to gain a visa to visit certain countries has become much harder. The amount of personal information they require is even more than what you'd need to apply for a job. And the worse part is how they haven't optimized their systems.
To file a request, you need to first fill out page after page of personal questions. If anything is incorrect, you won't be able to proceed to the next page. The problem is that they don't mark the problem like other websites. If everything you inputted was correct, well then good luck finding out the issue.
Hint: A big country that likes to control information