Zend certified PHP/Magento developer

Migration Magento 1.9.4 to Magneto 2.3.1 Uber Theme Can’t Login Customer

After migration Magento 1.9.4 to Magneto 2.3.1 Using Uber Theme Can’t Login Customer Account.

 php -f bin/magento customer:hash:upgrade
In ErrorHandler.php line 61:
  Notice: Undefined index: 0:1 in /home/scylbvxv/public_html/treasure/vendor/
  magento/framework/Encryption/Encryptor.php on line 198
customer:hash:upgrade

command show this type of error. Please tell anyone how I fix this issue.

https://i.stack.imgur.com/FdoXN.png

$hash = '$2y$10$gDsnA9DDJmQJYNCw8vciSOhhgVxL.98rjGK31/3lx2L1/LXexzwV2';

if (password_verify('mypassword', $hash)) {
    echo 'Password is valid!';
} else {
    echo 'Invalid password.';
}

use it can get the correct password.