Nah I doubt that was the cause for this case. It turns out the windows update caused the program was running fine on my other PC(which doesn't install the latest update yet) and behave the same way when I installed the latest update on the PC   More Detail: Looks like Chiitrans have a problem with .net frameworks v4.7. So, if you're using Chiitrans and facing the same issue, I recommend to go back to v4.6 to avoid this issue