diff --git a/src/app/components/submit-form/index.tsx b/src/app/components/submit-form/index.tsx
index e55a0ee..f650a8a 100644
--- a/src/app/components/submit-form/index.tsx
+++ b/src/app/components/submit-form/index.tsx
@@ -101,7 +101,7 @@ export default function SubmitForm() {
 			try {
 				conversion = convertQrCode(qrBytes);
 			} catch (error) {
-				setError(error as string);
+				setError(error instanceof Error ? error.message : String(error));
 				return;
 			}
 
diff --git a/src/lib/qr-codes.ts b/src/lib/qr-codes.ts
index bcb8802..cc376e7 100644
--- a/src/lib/qr-codes.ts
+++ b/src/lib/qr-codes.ts
@@ -40,7 +40,8 @@ export function convertQrCode(bytes: Uint8Array): { mii: Mii; tomodachiLifeMii:
 		}
 
 		return { mii, tomodachiLifeMii };
-	} catch {
+	} catch (error) {
+		console.error(error);
 		throw new Error("Mii data is not valid");
 	}
 }