...

1 files changed, 8 insertions, 2 deletions

diff --git a/FrontEnd/src/views/user/index.tsx b/FrontEnd/src/views/user/index.tsx
index 70b4f60f..7913b788 100644
--- a/FrontEnd/src/views/user/index.tsx
+++ b/FrontEnd/src/views/user/index.tsx
@@ -1,13 +1,19 @@
 import React from "react";
-import { useParams } from "react-router";
+import { useParams } from "react-router-dom";
 
 import TimelinePageTemplate from "../timeline-common/TimelinePageTemplate";
 import UserCard from "./UserCard";
 
+import { UiLogicError } from "@/common";
+
 import "./index.css";
 
 const UserPage: React.FC = () => {
-  const { username } = useParams<{ username: string }>();
+  const { username } = useParams();
+
+  if (username == null) {
+    throw new UiLogicError("No route param 'username'.");
+  }
 
   const [reloadKey, setReloadKey] = React.useState<number>(0);