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已经给出错误原因了，类名不存在
Cannot declare class Xc_demoCategoryCreate, because the name is already in use
迁移文件中的类型名要和文件名对应。
如
2022_06_27_000000_xc_demo_category_create
对应的类名为
XcDemoCategoryCreate
移除cookie加密中间件
\Illuminate\Cookie\Middleware\EncryptCookies::class
文件路径
app/Http/Kernel.php
