我從 GitHub 克隆了一個項目，并嘗試使用我安裝的 Composer 安裝包，沒有出現任何問題。我運行作曲家安裝。不幸的是，我遇到了這些我無法弄清楚的錯誤，我該怎么辦？    Loading composer repositories with package informationInstalling dependencies (including require-dev) from lock fileYour requirements could not be resolved to an installable set of packages.  Problem 1    - Installation request for tijsverkoyen/css-to-inline-styles 2.2.2 -> satisfiable by tijsverkoyen/css-to-inline-styles[2.2.2].    - tijsverkoyen/css-to-inline-styles 2.2.2 requires ext-dom * -> the requested PHP extension dom is missing from your system.  Problem 2    - Installation request for phar-io/manifest 1.0.3 -> satisfiable by phar-io/manifest[1.0.3].    - phar-io/manifest 1.0.3 requires ext-dom * -> the requested PHP extension dom is missing from your system.  Problem 3    - Installation request for phpunit/php-code-coverage 7.0.10 -> satisfiable by phpunit/php-code-coverage[7.0.10].    - phpunit/php-code-coverage 7.0.10 requires ext-dom * -> the requested PHP extension dom is missing from your system.  Problem 4    - Installation request for phpunit/phpunit 8.5.4 -> satisfiable by phpunit/phpunit[8.5.4].    - phpunit/phpunit 8.5.4 requires ext-dom * -> the requested PHP extension dom is missing from your system.  Problem 5    - Installation request for theseer/tokenizer 1.1.3 -> satisfiable by theseer/tokenizer[1.1.3].    - theseer/tokenizer 1.1.3 requires ext-dom * -> the requested PHP extension dom is missing from your system.  Problem 6    - tijsverkoyen/css-to-inline-styles 2.2.2 requires ext-dom * -> the requested PHP extension dom is missing from your system.    - laravel/framework v7.10.2 requires tijsverkoyen/css-to-inline-styles ^2.2.2 -> satisfiable by tijsverkoyen/css-to-inline-styles[2.2.2].    - Installation request for laravel/framework v7.10.2 -> satisfiable by laravel/framework[v7.10.2].  To enable extensions, verify that they are enabled in your .ini files:  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.