"Deep scan failed," smart scan won't complete the "virus and malware" step

Avast was working perfectly fine yesterday but today my usual deep scan keeps failing and the smart scan “virus and malware” step is stuck on 1%. Any suggestions? My machine is macOSCatolina, version 10.15.6.

https://i.imgur.com/raQjmeG.png

https://i.imgur.com/FBKmRLK.png

https://forum.avast.com/index.php?topic=237048.0