cd5da1bc77352c729b2fc671667f7721 mjb99-12-24d1t1.shn 1540e42fe5ee5c0b5318aab8f28621b7 mjb99-12-24d1t2.shn c37be91f52dafb3bf7e938fc61199bf9 mjb99-12-24d1t3.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned