db354d3e82967bb63dd2695d21e3a3bf *gd67-06-18d1t01.shn 968b802eb009e3bf57aa751f8b7e43bb *gd67-06-18d1t02.shn 3213d31db20db9bb0450d3ccdada0f5c *gd67-06-18d1t03.shn 1e9a3ae4009bb313266b9b9ece3b4d1e *gd67-06-18d1t04.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned