diff --git a/openflare_agent/internal/nginx/waf_assets.go b/openflare_agent/internal/nginx/waf_assets.go
index db9415ec..4426e165 100644
--- a/openflare_agent/internal/nginx/waf_assets.go
+++ b/openflare_agent/internal/nginx/waf_assets.go
@@ -50,7 +50,7 @@ local function load_config()
 end
 
 local function list_contains(items, value)
-    if not items or not value or value == "" then
+    if not items or type(items) ~= "table" or not value or value == "" then
         return false
     end
     for _, item in ipairs(items) do
@@ -95,7 +95,7 @@ local function ipv4_in_cidr(ip, cidr)
 end
 
 local function ip_matches(items, ip)
-    if not items or not ip or ip == "" then
+    if not items or type(items) ~= "table" or not ip or ip == "" then
         return false
     end
     for _, item in ipairs(items) do
@@ -196,7 +196,7 @@ end
 
 local country = nil
 for _, group in ipairs(groups) do
-    if group.country_whitelist and #group.country_whitelist > 0 then
+    if type(group.country_whitelist) == "table" and #group.country_whitelist > 0 then
         country = country or lookup_country(ip)
         if list_contains(group.country_whitelist, country) then
             return
@@ -211,7 +211,7 @@ for _, group in ipairs(groups) do
 end
 
 for _, group in ipairs(groups) do
-    if group.country_blacklist and #group.country_blacklist > 0 then
+    if type(group.country_blacklist) == "table" and #group.country_blacklist > 0 then
         country = country or lookup_country(ip)
         if list_contains(group.country_blacklist, country) then
             return exit_with_group(group)
diff --git a/openflare_server/utils/render/openresty/render.go b/openflare_server/utils/render/openresty/render.go
index 8adab7d6..5abc57d5 100644
--- a/openflare_server/utils/render/openresty/render.go
+++ b/openflare_server/utils/render/openresty/render.go
@@ -336,7 +336,7 @@ func renderOpenRestyLimitZoneBlock() string {
 }
 
 func renderOpenRestyObservabilityTemplateBlock() string {
-	return fmt.Sprintf("    log_by_lua_file %s/log.lua;\n    lua_shared_dict openflare_pow_challenges 10m;\n    lua_shared_dict openflare_pow_sessions 10m;\n    lua_shared_dict openflare_pow_config 1m;\n    lua_shared_dict openflare_waf_config 1m;\n\n    server {\n        listen %s;\n        server_name openflare-observability;\n        access_log off;\n\n        location = /openflare/stub_status {\n            stub_status;\n        }\n\n        location = /openflare/observability {\n            content_by_lua_file %s/observability.lua;\n        }\n    }\n\n", LuaDirPlaceholder, ObservabilityListenPlaceholder, LuaDirPlaceholder)
+	return fmt.Sprintf("    lua_shared_dict openflare_observability 10m;\n    lua_shared_dict openflare_pow_challenges 10m;\n    lua_shared_dict openflare_pow_sessions 10m;\n    lua_shared_dict openflare_pow_config 1m;\n    lua_shared_dict openflare_waf_config 1m;\n    init_worker_by_lua_file %s/observability/init.lua;\n    log_by_lua_file %s/observability/log.lua;\n\n    server {\n        listen %s;\n        server_name openflare-observability;\n        access_log off;\n\n        location = /openflare/stub_status {\n            stub_status;\n        }\n\n        location = /openflare/observability {\n            default_type application/json;\n            content_by_lua_file %s/observability/read.lua;\n        }\n    }\n\n", LuaDirPlaceholder, LuaDirPlaceholder, ObservabilityListenPlaceholder, LuaDirPlaceholder)
 }
 
 func renderHTTPProxyServer(serverNames string, siteName string, originURL string, originHost string, customHeaders []CustomHeader, cacheConfig routeCacheConfig, limitConfig routeLimitConfig, upstreamConfig routeUpstreamConfig, powEnabled bool, basicAuthEnabled bool, basicAuthUsername string, basicAuthPassword string, cfg ConfigSnapshot) string {