PHPWord-找不到类别'PhpOffice \ PhpWord \ PhpWord'

遇到错误,找不到“ PhpOffice \ PhpWord \ PhpWord”类 我的composer.json “ php”:“> = 7.0.0”,         “ abrigham / laravel-email-exceptions”:“ ^ 1.3”,         “ barryvdh / laravel-debugbar”:“ ^ 3.2”,         “ barryvdh / laravel-dompdf”:“ ^ 0.8.4”,         “ ckfinder / ckfinder-laravel-package”:“ ^ 3.5”,         “ karlomikus / theme”:“ ^ 1.0”,         “ laravel / framework”:“ 5.5。”,         “ laravel / socialite”:“ ^ 3.0”,         “ laravel / tinker”:“〜1.0”,         “ laravelcollective / html”:“ ^ 5.4.0”,         “ leafo / scssphp”:“ ^ 0.7.7”,         “ maatwebsite / excel”:“〜2.1.0”,         “ nicolaslopezj / searchable”:“ 1。”,         “ niklasravnsborg / laravel-pdf”:“ ^ 3.1”,         “ phpoffice / phpword”:“ ^ 0.17.0”,         “ shivella / laravel-bitly”:“ ^ 1.0”,         “ simplesoftwareio / simple-qrcode”:“ ^ 2.0”,         “ sofa / laravel-global-scope”:“ ^ 0.2.0”,         “ yajra / laravel-datatables”:“ ^ 1.0”,         “ yajra / laravel-datatables-oracle”:“ ^ 8.0”,         “ zendframework / zend-escaper”:“ ^ 2.6”,         “ zendframework / zend-stdlib”:“ ^ 3.2”