I am in Module 3 of the LVGL Course, Display Data from Sensor. 
In modules 1 and 2, everything is working smoothly, both the Codes and Hardware (LVGL).
 
But in Module 3.1. After uploading the code, the display in my LVGL is Black Screen.
What is the possible cause of this problem, and what is its solution? I tried to troubleshoot, but the result is
 still a black screen. Please help me to resolve this issue, I can not move forward. 
 
Thanks and God Bless you All.