10068144ad6d96e7088c1d4247dd5be9 *kdtu2002-06-21d2t02.shn 41d0bd081b14550c3c3ac52147dfb089 *kdtu2002-06-21d2t01.shn fb1285c4d6ff52d4a34d444bb7f2626d *kdtu2002-06-21d2t03.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned