Cannot read property 'split' of undefined [Winlogbeat]

[ThreatInter (Threat)]

Hello, everyone!
We have troubles with our winlogbeat agent. Sometimes it writes error message "TypeError: Cannot read property 'split' of undefined at C:\Program Files\Winlogbeat/module/security/config/winlogbeat-security.js:1522:24(16)"
At string 1522 we saw this code

Can someone explain us what wrong here and how to avoid this error?

[mtojek (Marcin Tojek)]

I guess it means that the user is not defined. Could you try adding a check if the user is not empty?

[ThreatInter (Threat)]

Already testing