Nginx WAF 8.7.9 show error

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i'm newly install Nginx WAF 8.7.9 on my vps, and click the setting show this error. how to fix.

aaP_u8dbzh17f4 Hello, what system server?

Have installed security software, first turn off, and then uninstall and reload the plug-in to try.

aaPanel_thisyear I already try this method but now working