First of all, thank you for taking the class :) I will check it out, but if you let me know which part of the lecture is causing the pop-up problem, I will take action. I think it will help other people take the class smoothly, so please share the information even though you are busy.

Hello, Shin Jong-il. First of all, thank you for taking the course. The content you left is difficult for Office Tutor to identify and resolve. Therefore, we believe that this issue should be resolved by Inflearn engineers. If the problem persists during the course, please report it to the Inflearn website at the bottom right corner. Have a nice day!