"Send test sms messge" desn't work

Hi,
Maybe this issue duplicates with
https://www.drupal.org/project/twilio/issues/2264771 → or
https://www.drupal.org/project/twilio/issues/2753931 💬 Twilio SMS not working Closed: works as designed

But I write my own case for detail here, in order to more clear what is the problem.

Here is what I did.

1. Installed and enabled Twilio module(7.x-1.11)
2. Downloaded the library from https://github.com/twilio/twilio-php/archive/4.11.0.tar.gz
3. Extract the library and renamed it to "twilio"
4. Go to /admin/config/system/twilio
5. Input fields
   • Twilio Account SID => TEST ACCOUNT SID for my twilio account
   • Twilio Auth Token => TEST AUTHTOKEN for my twilio account
   • Twilio Phone Number => +15005550006 (I got this number for test from https://www.twilio.com/docs/api/errors/21606)
   • COUNTRY CODES => Choosed "USA / Canada / Dominican Rep. / Puerto Rico (1)" and "Japan (81)"
6. Save the setting.
7. Go to /admin/config/system/twilio/test and set the fields
   • Choosed Country => Japan (81)
   • Phone Number => My mobile phone number registered in my Twilio account
8. Click "Send SMS"
9. The message "Your message has been sent" appears but nothing happens...

Does anybody have advice for this problem?
Any idea will be welcomed.
Thank you in advance,