Why i can't signup and getting error "The phone number provided is not valid or contains invalid characters."

Hello Team,

I am not able to signup or create account free tier for learning aws cloud service. While i am going to signup on step 2. Enter all required contact information with "Personal - for your own projects" and getting error like "The phone number provided is not valid or contains invalid characters." while click on button.

i tried with phone format. Still getting the same error. Can you please fix it ASAP ? I am able to signup and start learning for it.