Error authentication to private repository

[emulienfou]

The public/private ssh key is note loaded.
Username/password asked and receive the next error message:

Reading composer.json of harmony/route-manager (master)Reading /root/.composer/cache/repo/github.com/harmonycms/route-manager/8bda784d525d37e228bd679ce95f7fa7f1c5de79 from cache
    Authentication required (git.harmonycms.net):                                                                         

       Username: :
 > 	

       Password: :
 > 


Fatal error: Uncaught Error: Call to undefined method Harmony\Flex\IO\ConsoleIO::getErrorOutput() in /usr/src/harmony/project/vendor/harmony/flex/src/IO/ConsoleIO.php:304
Stack trace:
#0 phar:///usr/local/bin/composer/src/Composer/Util/AuthHelper.php(49): Harmony\Flex\IO\ConsoleIO->askAndValidate(Object(Symfony\Component\Console\Question\Question), Object(Closure), NULL, 'y')
#1 phar:///usr/local/bin/composer/src/Composer/Util/Git.php(189): Composer\Util\AuthHelper->storeAuth('git.harmonycms....', 'prompt')
#2 phar:///usr/local/bin/composer/src/Composer/Util/Git.php(226): Composer\Util\Git->runCommand(Object(Closure), 'https://git.har...', NULL, true)
#3 phar:///usr/local/bin/composer/src/Composer/Repository/Vcs/GitDriver.php(60): Composer\Util\Git->syncMirror('https://git.har...', '/root/.composer...')
#4 phar:///usr/local/bin/composer/src/Composer/Repository/VcsRepository.php(96): Composer\Repository\Vcs\GitDriver->initialize()
#5 phar:///usr/local/bin/composer/src/Composer/Repository/VcsRepository.php(123): Composer\Re in /usr/src/harmony/project/vendor/harmony/flex/src/IO/ConsoleIO.php on line 304