It didn't fail this morning. Fleshclam log shows it checking for updates hourly. Last three hours of updates from freshclam log don't show any changes but the daily.cld did change from version 25415 to 25416 at 04:02 this morning.

ClamAV update process started at Thu Apr 11 07:02:01 2019
WARNING: Your ClamAV installation is OUTDATED!
WARNING: Local version: 0.99.3 Recommended version: 0.101.2
DON'T PANIC! Read http://www.clamav.net/documents/upgrading-clamav
main.cld is up to date (version: 58, sigs: 4566249, f-level: 60, builder: sigmgr)
daily.cld is up to date (version: 25416, sigs: 1550281, f-level: 63, builder: raynman)
bytecode.cld is up to date (version: 328, sigs: 94, f-level: 63, builder: neo)
--------------------------------------
ClamAV update process started at Thu Apr 11 08:02:01 2019
WARNING: Your ClamAV installation is OUTDATED!
WARNING: Local version: 0.99.3 Recommended version: 0.101.2
DON'T PANIC! Read http://www.clamav.net/documents/upgrading-clamav
main.cld is up to date (version: 58, sigs: 4566249, f-level: 60, builder: sigmgr)
daily.cld is up to date (version: 25416, sigs: 1550281, f-level: 63, builder: raynman)
bytecode.cld is up to date (version: 328, sigs: 94, f-level: 63, builder: neo)
--------------------------------------
ClamAV update process started at Thu Apr 11 09:02:01 2019
WARNING: Your ClamAV installation is OUTDATED!
WARNING: Local version: 0.99.3 Recommended version: 0.101.2
DON'T PANIC! Read http://www.clamav.net/documents/upgrading-clamav
main.cld is up to date (version: 58, sigs: 4566249, f-level: 60, builder: sigmgr)
daily.cld is up to date (version: 25416, sigs: 1550281, f-level: 63, builder: raynman)
bytecode.cld is up to date (version: 328, sigs: 94, f-level: 63, builder: neo)

Thanks again, Nick.