laravel-admin-ext/ckeditor[v1.0.0, ..., v1.0.1] require encore/laravel-admin ~1.6 -> found encore/laravel-admin[v1.6.0, ..., v1.8.14] but it conflicts with your root composer.json require (2.*).
Root composer.json requires laravel-admin-ext/ckeditor ^1.0 -> satisfiable by laravel-admin-ext/ckeditor[v1.0.0, v1.0.1].
Problem 1