When scanning a target, you might encounter a situation where the Status column of a scan shows a warning icon.
This generally indicates that the scan completed, however Acunetix encountered a problem while running the scan. Clicking on the Scan will provide more information on what happened.
The Scan Information tab is a good place to start troubleshooting such issues. In this case, Acunetix shows that an AntiVirus engine was not detected, with the result that Malware Scanning for this Target was not possible.
In addition, you can check the Events for the scan which shows additional debug information.