diff --git a/apps/wr/app/api/common-codes/route.ts b/apps/wr/app/api/common-codes/route.ts
index aa62b261b..ae0c175cd 100644
--- a/apps/wr/app/api/common-codes/route.ts
+++ b/apps/wr/app/api/common-codes/route.ts
@@ -63,7 +63,12 @@ async function fetchJson(url: string, cookieHeader?: string) {
   });
 
   if (!response.ok) {
-    throw new Error(`Failed to fetch ${url}: ${response.status}`);
+    const responseText = await response.text();
+    throw new Error(
+      `Failed to fetch ${url}: ${response.status} ${response.statusText}${
+        responseText ? ` - ${responseText}` : ""
+      }`
+    );
   }
 
   return response.json();
@@ -200,8 +205,14 @@ export async function GET(request: Request) {
     });
   } catch (error) {
     console.error("Failed to load common codes:", error);
+    const message =
+      error instanceof Error ? error.message : "Failed to load common codes";
+
     return NextResponse.json(
-      { message: "Failed to load common codes" },
+      {
+        message: "Failed to load common codes",
+        detail:message ,
+      },
       { status: 500 }
     );
   }
diff --git a/apps/wr/app/store/common/code/index.ts b/apps/wr/app/store/common/code/index.ts
index 0ddb7fc8c..5e6600960 100644
--- a/apps/wr/app/store/common/code/index.ts
+++ b/apps/wr/app/store/common/code/index.ts
@@ -379,7 +379,24 @@ export const codeActionExport: (set: any, get:any) => comCodeActions = (set: any
       });
 
       if (!response.ok) {
-        throw new Error(`공통 코드 조회 실패: ${response.status}`);
+        let errorMessage = `공통 코드 조회 실패: ${response.status}`;
+
+        try {
+          const errorBody = await response.json();
+          if (errorBody?.detail) {
+            errorMessage += ` - ${errorBody.detail}`;
+          } else if (errorBody?.message) {
+            errorMessage += ` - ${errorBody.message}`;
+          }
+        } catch {
+          const errorText = await response.text();
+          if (errorText) {
+            errorMessage += ` - ${errorText}`;
+          }
+        }
+
+        console.error("initCommonCodes failed:", errorMessage);
+        throw new Error(errorMessage);
       }
 
       const data = await response.json();