http://pyrocms.com/documentation/pyrocms/v3.1#installation/installing-pyrocms/running-the-installer
このエラー
の取得
"An exception has been thrown during the rendering of a template ("file_put_contents(app/default/assets/admin/theme.css): failed to open stream: No such file or directory") in "theme::partials/metadata" at line 24."
これまでに何を試しましたか？
- と の権限をstorage変更bootstrap\chacheする777
-php artisan asset:clear