d5b9181fbb296114e8bcedc4f89bf145 *sci2001-03-18d2t1.shn 4cef7d75290a10416c44f57a9fe4a7f8 *sci2001-03-18d2t2.shn 68dba23ad884ab2bbadb41155372c8e7 *sci2001-03-18d2t3.shn cbfbd88081ce356ebe57c102534c1207 *sci2001-03-18d2t4.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned