Now it's working for me again. Thanks a lot for support, guys!
Just a quick update from me to other users,
as until today singapore time ( GMT +8Hrs ) on sept 11 2019 the mine.nu domain zone
is still working perfectly after yesterday sept 10 2019 incident so Oracle DynDNS team or teams so keep it up.
Message to: Oracle DynDNS team or teams
Hoped you will remember to renew the host early in a fashion manner to prevent such incident from happening again in future which will bring issue or issues to customer like me.
As for this, computer does make mistake also, same to us human, but we can overcome it by preventing it even if it cannot be cured.
Okay I hereby i signing off for now on this particular detected issue.
Have a nice day to all of you including the Oracle DynDNS team or teams.