Amavis error in /var/log/mail.err "mail amavis[2768]: (02768-01) (!!)AV: ALL VIRUS SCANNERS FAILED"

I am running an Ubuntu LEMP server with postfix/dovecot, as well as clamscan, amavis, and spamassassin. As of now, everything is working just fine. However, I am glancing over my mail error logs located in /var/log/mail.err, and noticed two lines, that may or may not be related. I am very new to understanding mail logs, so need some help in understanding what this is trying to tell me, and how to fix it. Please advise.

cat /etc/log/mail.err
Jan 20 12:58:52 mail amavis[2768]: (02768-01) (!!)AV: ALL VIRUS SCANNERS FAILED
Jan 20 13:49:21 mail spamass-milter[2185]: Could not retrieve sendmail macro "i"!.  Please add it to confMILTER_MACROS_ENVFROM for better spamassassin results

Could someone please tell me what these lines regarding amavis and spamass-milter are telling me and how to fix this? Thank you kindly.