2FA - Authy screen Country drop-down empty

[KnittyNoddy]

Magento 2.4.1, I had 2FA working with BOTH Authy and Google Authenticator.

A 3rd-party extension @Amasty provider asked me to disable 2FA on my site temporarily, so I did via:

bin/magento module:disable Magento_TwoFactorAuth
bin/magento cache:flush

Now I've re-enabled 2FA by:

bin/magento module:enable Magento_TwoFactorAuth
bin/magento cache:flush

And now the 2FA - Authy login screen has an empty Country drop-down list, and which keeps Authy from working.

Empty Country drop-down

I have checked file permissions, reset caches, everything I could think of.

Can someone help me get this fixed - I really want to use Authy.

Thanks.

[KnittyNoddy]

OK - I have figured out the problem, now I need some help to fix it.

It SEEMS like when I disabled Magento_TwoFactorAuth, it DELETED the CONTENTS of the tfa_country_codes table in the database.

That table is there, but EMPTY!

Then the subsequent re-enable of Magento_TwoFactorAuth did NOT RE-POPULATE that table!

So - can someone tell me how to cleanly repopulate that table in my database?

[djay]

For anyone else who has this problem, I fixed it by exporting that database table "tfa_country_codes" as a csv file, from another install/database and importing it into the database table where it was missing.

However, I now have a new problem. When I go to login via authy, it sends the SMS to my phone, but comes up with this error on the Magento admin login page and does not allow you to continue:

Error

Notice: Undefined index: carrier in ... /html/vendor/magento/module-two-factor-auth/Model/Provider/Engine/Authy/Verification.php on line 106

Line 106 in Verification.php is: 'carrier' => $response['carrier'],

Here is the whole function in Verification.php:

$this->userConfigManager->addProviderConfig((int) $user->getId(), Authy::CODE, [

'country_code' => $country,

'phone_number' => $phoneNumber,

'carrier' => $response['carrier'],

'mobile' => $response['is_cellphone'],

'verify' => [

'uuid' => $response['uuid'],

'via' => $method,

'expires' => $this->dateTime->timestamp() + $response['seconds_to_expire'],

'seconds_to_expire' => $response['seconds_to_expire'],

'message' => $response['message'],

],

'phone_confirmed' => false,

]);

Any help with this would be much appreciated.

Thanks