Read this online at https://blog.clamav.net/2023/03/clamav-eol-of-0104x-versions.html

Effective March 28, 2023, ClamAV 0.104.0 (and all patch versions) will no longer be supported in accordance with ClamAV's EOL policy. 

End of life (EOL) for ClamAV means: 

• We will no longer be testing against that version when we write signatures. 
• That version may no longer be working as part of future updates. 
• Signature updates for that version will be blocked when attempting to download from the mirror update system. 

Please upgrade to a supported version of ClamAV, currently at 0.103.8, 0.105.2, and 1.0.1, available for download now.