Avast Premium ver. 19.8.2393 on Windows 10 Pro/64, build 1909 (ver. 18363.535). After Dec. 2019 WU (KB4532441), Security Center does not recognize AV component as active. "Turn On" button in Security Center has no effect. Firewall *is* recognized as active. Repair installation x2 has no effect. No change in settings, all core shields present and correct.
Any ideas?