Or because the malware author borked the decryptor. https://www.bleepingcomputer.com/news/security/ryuk-ransomware-decryptor-is-broken-could-lead-to-data-loss/

Or because the malware author borked the decryptor. https://www.bleepingcomputer.com/news/security/ryuk-ransomware-decryptor-is-broken-could-lead-to-data-loss/ https://www.bleepingcomputer.com/news/security/ryuk-ransomwa...