I am certain this isn't user mistake, Considering that the recovery phrase was present in two distinctive areas: backed up in a file on S3, and printed over a piece of paper. Standard recovery phrases use a particular list of 2048 words adhering to the BIP39 standard (Bitcoin Advancement Proposal https://meshbookmarks.com/story18862105/an-unbiased-view-of-bip39-seed-phrase-github