The situation appears to have been resolved now that a founder and private keyholder has apparently been released from some form of custody. The fact that such a business disruption occurred for a relatively mature crypto exchange highlights one of the unsung, 'elephant-in-the-room' issues in crypto.
Crypto exchange OKEx’s withdrawals remain suspended since October 16 when the venue announced it was unable to process them due to an unidentified staff member responsible for holding private keys being out of touch while cooperating with unspecified authorities.
Filecoin, described as a ‘decentralized storage network designed to store humanity’s most important information,’ was developed by San Francisco-based Protocol Labs. The project raised USD 257M in a 2017 ICO.