Security Error: Invalid parent ERROR in DirectAdmin

[needhelppp]

Hi. When I try to open my ConfigServer firewall from plugins list (Extra features) in DirectAdmin. I get this error:

```
ConfigServer Security & Firewall

Security Error: Invalid parent
Information saved to [/var/lib/csf/da1644943308.error]
```

I looked at that error file and found this (IP ommited):

```
[root@alpha ~]# cat /var/lib/csf/da1644928660.error
To disable DirectAdmin session checks, create a touch file called /var/lib/csf/csf.da.skip

Security Error: Invalid parent

Session ID = [wANWUGvNtnfuzc2Cb2oGuX54ADwZD5ZAEueg8X11KetHGtTqwF6qm9uxKpUYs1g4]
Session File [/usr/local/directadmin/data/sessions/da_sess_wANWUGvNtnfuzc2Cb2oGuX54ADwZD5ZAEueg8X11KetHGtTqwF6qm9uxKpUYs1g4]...exists.

Environment data:
REMOTE_ADDR = [IP.IP.IP.IP]
SESSION_KEY = [tIi1pk17OuOdmsRi7XYseRnzGHV8H9DARtCGdBN03lbpb2XhX4Z9VM8lbbrsk21B]
SESSION_ID = [wANWUGvNtnfuzc2Cb2oGuX54ADwZD5ZAEueg8X11KetHGtTqwF6qm9uxKpUYs1g4]

Session data:
ip = [IP.IP.IP.IP]
key = [tIi1pk17OuOdmsRi7XYseRnzGHV8H9DARtCGdBN03lbpb2XhX4Z9VM8lbbrsk21B]

Session file contents:
home_memory=3
host=host.domain.com:port
ip=IP.IP.IP.IP
key=tIi1pk17OuOdmsRi7XYseRnzGHV8H9DARtCGdBN03lbpb2XhX4Z9VM8lbbrsk21B
passwd=M0tNQTVxWFBLWEJrQnNjeFhzekRFc2h2eVVzSHk5WlFlclBCTVZMM056d2F6YlZXc1Rmd0dWU0FHcUMzdUpGQw==
```

Any ideas what happened and how to fix it?

DirectAdmin support told me to contact CSF support...

Thanks!

[needhelppp]

Hello.
For me the update and reboot of Master server helped to solve this issue. (DirectAdmin with firewall is on VPS, which is on that master server)