에러코드에 따른 원인 알 수 있을까요

Error: Header Signature: Expected d0cf11e0a1b11ae1 saw 3c21444f43545950
    at Uint8Array.CheckField [as chk] (cfb.js:159:1)
    at check_get_mver (cfb.js:473:1)
    at parse (cfb.js:387:1)
    at Object.read (cfb.js:697:1)
    at parse (parse.ts:95:1)
    at new HWPViewer (viewer.ts:88:1)
    at PayProofBody.js:57:1