diff --git a/open-isle-cli/src/App.vue b/open-isle-cli/src/App.vue
index 544fbd5e6..d29f19b10 100644
--- a/open-isle-cli/src/App.vue
+++ b/open-isle-cli/src/App.vue
@@ -26,7 +26,7 @@ export default {
   },
   computed: {
     hideMenu() {
-      return ['/login', '/signup'].includes(this.$route.path)
+      return ['/login', '/signup', '/404'].includes(this.$route.path)
     }
   }
 }
diff --git a/open-isle-cli/src/views/NotFoundPageView.vue b/open-isle-cli/src/views/NotFoundPageView.vue
index 77a85310a..7a3390a38 100644
--- a/open-isle-cli/src/views/NotFoundPageView.vue
+++ b/open-isle-cli/src/views/NotFoundPageView.vue
@@ -1,7 +1,7 @@
 <template>
   <div class="not-found-page">
     <h1>404 - 页面不存在</h1>
-    <p>你访问的页面不存在或已被删除。</p>
+    <p>你访问的页面不存在或已被删除</p>
     <router-link to="/">返回首页</router-link>
   </div>
 </template>
@@ -17,9 +17,9 @@ export default {
   display: flex;
   flex-direction: column;
   align-items: center;
-  justify-content: center;
   height: calc(100vh - var(--header-height));
   text-align: center;
+  background-color: var(--background-color);
 }
 
 .not-found-page h1 {
diff --git a/src/main/java/com/openisle/controller/UserController.java b/src/main/java/com/openisle/controller/UserController.java
index 1403fa58c..4b53d6236 100644
--- a/src/main/java/com/openisle/controller/UserController.java
+++ b/src/main/java/com/openisle/controller/UserController.java
@@ -1,5 +1,6 @@
 package com.openisle.controller;
 
+import com.openisle.exception.NotFoundException;
 import com.openisle.model.User;
 import com.openisle.service.*;
 import org.springframework.beans.factory.annotation.Value;
@@ -80,7 +81,7 @@ public class UserController {
     @GetMapping("/{identifier}")
     public ResponseEntity<UserDto> getUser(@PathVariable("identifier") String identifier,
                                            Authentication auth) {
-        User user = userService.findByIdentifier(identifier).orElseThrow();
+        User user = userService.findByIdentifier(identifier).orElseThrow(() -> new NotFoundException("User not found"));
         return ResponseEntity.ok(toDto(user, auth));
     }