It was weird since my Internet was working and I have signed in with my Apple ID already. Anyway, here is a video tutorial that shows the step-by-step procedure on how to fix it:
If you have any questions or need any help with the procedure, please feel free to contact me or leave a comment below.
Thanks for the solution goes to EranMe and Hoscar, and the awesome people who share their knowledge and experience on the Apple Support Communities forum.