diff --git a/plugins/wasm-go/extensions/ai-proxy/config/config.go b/plugins/wasm-go/extensions/ai-proxy/config/config.go
index 48f08dd9e4..f0b820345a 100644
--- a/plugins/wasm-go/extensions/ai-proxy/config/config.go
+++ b/plugins/wasm-go/extensions/ai-proxy/config/config.go
@@ -80,13 +80,16 @@ func (c *PluginConfig) Complete(log wrapper.Log) error {
 		c.activeProvider = nil
 		return nil
 	}
+
 	var err error
+
 	c.activeProvider, err = provider.CreateProvider(*c.activeProviderConfig)
+	if err != nil {
+		return err
+	}
 
 	providerConfig := c.GetProviderConfig()
-	err = providerConfig.SetApiTokensFailover(log, c.activeProvider)
-
-	return err
+	return providerConfig.SetApiTokensFailover(log, c.activeProvider)
 }
 
 func (c *PluginConfig) GetProvider() provider.Provider {
diff --git a/plugins/wasm-go/extensions/ai-proxy/main.go b/plugins/wasm-go/extensions/ai-proxy/main.go
index dc6bc123ce..fb3592fa07 100644
--- a/plugins/wasm-go/extensions/ai-proxy/main.go
+++ b/plugins/wasm-go/extensions/ai-proxy/main.go
@@ -40,9 +40,11 @@ func parseGlobalConfig(json gjson.Result, pluginConfig *config.PluginConfig, log
 
 	pluginConfig.FromJson(json)
 	if err := pluginConfig.Validate(); err != nil {
+		log.Errorf("global rule config is invalid: %v", err)
 		return err
 	}
 	if err := pluginConfig.Complete(log); err != nil {
+		log.Errorf("failed to apply global rule config: %v", err)
 		return err
 	}
 
@@ -56,9 +58,11 @@ func parseOverrideRuleConfig(json gjson.Result, global config.PluginConfig, plug
 
 	pluginConfig.FromJson(json)
 	if err := pluginConfig.Validate(); err != nil {
+		log.Errorf("overriden rule config is invalid: %v", err)
 		return err
 	}
 	if err := pluginConfig.Complete(log); err != nil {
+		log.Errorf("failed to apply overriden rule config: %v", err)
 		return err
 	}
 
diff --git a/plugins/wasm-go/extensions/ai-proxy/provider/openai.go b/plugins/wasm-go/extensions/ai-proxy/provider/openai.go
index 0a170347f5..2def57aa62 100644
--- a/plugins/wasm-go/extensions/ai-proxy/provider/openai.go
+++ b/plugins/wasm-go/extensions/ai-proxy/provider/openai.go
@@ -2,7 +2,6 @@ package provider
 
 import (
 	"encoding/json"
-	"fmt"
 	"net/http"
 	"path"
 	"strings"
@@ -58,10 +57,10 @@ func (m *openaiProviderInitializer) CreateProvider(config ProviderConfig) (Provi
 	}
 	customUrl := strings.TrimPrefix(strings.TrimPrefix(config.openaiCustomUrl, "http://"), "https://")
 	pairs := strings.SplitN(customUrl, "/", 2)
-	if len(pairs) != 2 {
-		return nil, fmt.Errorf("invalid openaiCustomUrl:%s", config.openaiCustomUrl)
+	customPath := "/"
+	if len(pairs) == 2 {
+		customPath += pairs[1]
 	}
-	customPath := "/" + pairs[1]
 	isDirectCustomPath := isDirectPath(customPath)
 	capabilities := m.DefaultCapabilities()
 	if !isDirectCustomPath {