runtime error attempt to index local 'self' (a nil value)

[hammedsadeghi]

hi
i got this error in openresty
2019/10/06 05:38:42 [error] 27103#0: *2 lua entry thread aborted: runtime error: /usr/local/openresty/site/lualib/resty/waf.lua:430: attempt to index local 'self' (a nil value)
stack traceback:
coroutine 0:
/usr/local/openresty/site/lualib/resty/waf.lua: in function 'exec'
access_by_lua(sabahost.org.conf:109):8: in main chunk, client: 5.201.182.158, server: sabahost.org, request: "GET /?test=alert(1) HTTP/1.1", host: "sabahost.org"
can you help me?

[GumpSun]

attempt to index local 'self' (a nil value) , Lua variable nil error.You did't use lua_resty_waf:new()?

[GumpSun]

https://github.com/p0pr0ck5/lua-resty-waf/issues/319#issuecomment-541293290