As it asked in the question to ignore the notes.txt file from git's radar. I tried and used the command in the Hint but still showing permission denied. Please help. Attached the lab URL
I just checked and the lab worked just file as below image.
I noticed you have a file named .gitignore.txt, maybe you should remove it and try again, or reset the lab and try again following my image.
Sure Trung, Thank you so much for your help.