Maingalarpar @EiMyatMon
There are 5 different Blynk servers around the globe, but your account will only exist on one of them, The nearest one to Myanmar is in Singapore. If you use a VPN that masks your geolocation then your account may have been created on a different server such as London, New Your, Frankfurt or Bangalore.
Does your VPN allow you to choose which country you appear to be located in?
Also, the Singapore server was down earlier, which may have been the cause of the problem…
Pete.