Hi
Try in your composer :
"psr-4": {
"EtAliMaMa\\Controllers": "controllers/"
in routes.yms
_controller: 'EtAliMaMa\Controller\admin\AdminTaoBaoController::indexAction'
and in
//etalimama/controllers/admin/AdminTaoBaoController.php
namespace EtAliMaMa\Controller\admin;
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