Are there any red flags that could disqualify an application?
Yes, there are some. For example, photographs that are not taken correctly, e.g., the size of the head is wrong, the background is too light or too dark or the color are not suitable. People must also take off their national hats or scarves (if any), so that their ears can be seen. You also need to enter the correct data regarding education and place of residence and birth. Usually, people make mistakes giving these details which leads to disqualification.