Why can't Line (app) register my phone number?

[Windows Central Question]

Why Line (app) cannot register my phone number

I just bought Lumia 730, so far so good, but there's 1 problem
My problem is that I can't register my phone number in Line. I have my previous Line account from Android, email registration is fine, but in phone number, any phone number I entered was invalid. Do anyone had this kind of problem? Thanks

 

[Laurensius Adi]

I had the same problem. Just bought lumia 730. line keeps getting notification "Please re-enter email adress..." . still can't sign in.