config rules for detector / snserver

Hi, i tried to use free SafeLine WAF Community Edition, and tried to add this as additional layer of security for my nginx(openresty). I started snserver(with custom docker file), but when used lua t1k, when do_access i got ',' for every request and so i don't understand where and how config for snserver/ detector should looks like and how to pass it to snserver?

like this https://github.com/apache/apisix/blob/master/apisix/plugins/chaitin-waf.lua#L318