diff --git a/src/app/s/[surveyId]/layout.tsx b/src/app/s/[surveyId]/layout.tsx
index cc44648..11a396e 100644
--- a/src/app/s/[surveyId]/layout.tsx
+++ b/src/app/s/[surveyId]/layout.tsx
@@ -26,7 +26,7 @@ export async function generateMetadata(
     title,
     openGraph: {
       description,
-      images: [thumbnail, ...previousImages],
+      images: [thumbnail ?? '/path/to/default-image.png', ...previousImages], // thumbnail이 null인 경우 기본 이미지 사용
     },
   };
 }
diff --git a/src/components/management/result/PieChartComponent.tsx b/src/components/management/result/PieChartComponent.tsx
index 6c45642..ebe4b97 100644
--- a/src/components/management/result/PieChartComponent.tsx
+++ b/src/components/management/result/PieChartComponent.tsx
@@ -61,10 +61,12 @@ export default function PieChartComponent({ responses }: { responses: Response[]
         callbacks: {
           label: (context) => {
             const value = context.parsed;
-            const total = context.chart.data.datasets[context.datasetIndex].data.reduce(
-              (acc: number, val: number) => acc + val,
-              0
-            );
+            const total = (context.chart.data.datasets[0].data as number[]).reduce((acc, val) => {
+              if (typeof val === 'number') {
+                return acc + val;
+              }
+              return acc;
+            }, 0);
             const percentage = ((value / total) * 100).toFixed(1);
             return ` ${value} (${percentage}%)`;
           },
diff --git a/src/components/mypage/SurveyCreateButton.tsx b/src/components/mypage/SurveyCreateButton.tsx
index 101e412..88476b5 100644
--- a/src/components/mypage/SurveyCreateButton.tsx
+++ b/src/components/mypage/SurveyCreateButton.tsx
@@ -9,17 +9,14 @@ export default function SurveyCreateButton() {
   const mutation = useCreateSurvey();
 
   async function createNewSurvey() {
-    mutation.mutate(
-      {},
-      {
-        onSuccess: (data) => {
-          nextRouter.push(`/workbench/${data.surveyId}`);
-        },
-        onError: (error) => {
-          showToast('error', (error.cause as ErrorCause).message);
-        },
-      }
-    );
+    mutation.mutate(undefined, {
+      onSuccess: (data) => {
+        nextRouter.push(`/workbench/${data.surveyId}`);
+      },
+      onError: (error) => {
+        showToast('error', (error.cause as ErrorCause).message);
+      },
+    });
   }
 
   return (