Currently configuration (at least routes) is partly overriden byacacha/adminlte-laravel, and if I try to unregisterAcacha\AdminLTETemplateLaravel\Providers\AdminLTETemplateServiceProvider::class provider (as suggessted#47,#63,#59), then session is recreated with each request (laravel/framework#13352).

So that Session::flash(), etc. stops working properly!

That was horrible to debug. 😄