apt 存储库中的 composer 包在执行每个命令时都会失败 ( composer install, composer update, composer list, composer --version)
错误信息
PHP Warning: require(Composer/autoload.php): failed to open stream: No such file or directory in /usr/bin/composer on line 8
PHP Fatal error: require(): Failed opening required 'Composer/autoload.php' (include_path=':/usr/share/kopano/php') in /usr/bin/composer on line 8
（错误报告https://bugs.launchpad.net/ubuntu/+source/composer/+bug/1768023）