Critical error of Scan Manager

Firmware is 6.3.0r13.0.

Just received an email alert

[00001] 2019-06-25 21:52:43 [Root]system-critical-00554: SCAN-MGR: Check AV pattern file failed with error code: test load db fail on worker load db failure.

Resource status is normal now. Memory is using about 50%.

This alert appear only one time last night. I don't know how much CPU and Memory left last night.

There is no more alert now. Is that mean the firewall status resume?