diff --git a/app/Http/Controllers/NewsController.php b/app/Http/Controllers/NewsController.php
index a766e85b..411e6e36 100644
--- a/app/Http/Controllers/NewsController.php
+++ b/app/Http/Controllers/NewsController.php
@@ -7,6 +7,7 @@ use App\Models\News;
 use App\Repositories\NewsRepository;
 use Carbon\Carbon;
 use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Validation\Rule;
 use Nexus\Database\NexusDB;
@@ -104,10 +105,15 @@ class NewsController extends Controller
     {
         $user = Auth::user();
         $result = News::query()->orderBy('id', 'desc')->first();
-        $resource = new NewsResource($result);
+        if ($result) {
+            $resource = new NewsResource($result);
+        } else {
+            $resource = new JsonResource(null);
+        }
         $resource->additional([
             'site_info' => site_info(),
         ]);
+
         /**
          * Visiting the home page is the same as viewing the latest news
          * @see functions.php line 2590
diff --git a/app/Http/Controllers/PollController.php b/app/Http/Controllers/PollController.php
index 8e4ed42e..61b53ddb 100644
--- a/app/Http/Controllers/PollController.php
+++ b/app/Http/Controllers/PollController.php
@@ -6,6 +6,7 @@ use App\Http\Resources\PollResource;
 use App\Models\Poll;
 use App\Repositories\PollRepository;
 use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Validation\Rule;
 
@@ -96,7 +97,6 @@ class PollController extends Controller
     }
 
     /**
-     * @todo 弃权选项
      * @return array
      */
     public function latest()
@@ -130,9 +130,11 @@ class PollController extends Controller
             foreach ($answerStats as $index => &$value) {
                 $value = number_format(($value / $poll->answers_count) * 100, 2) . '%';
             }
+            $resource = new PollResource($poll);
+        } else {
+            $resource = new JsonResource(null);
         }
 
-        $resource = new PollResource($poll);
         $resource->additional([
             'selection' => $selection,
             'answer_stats' => $answerStats,
diff --git a/nexus/Install/update/update.php b/nexus/Install/update/update.php
index b7d0b432..48304742 100644
--- a/nexus/Install/update/update.php
+++ b/nexus/Install/update/update.php
@@ -25,17 +25,16 @@ if ($currentStep == 1) {
 if ($currentStep == 2) {
     $tableRows = [];
     $versionTable = $versions = [];
-    $cacheKkey = '__versions_' . date('Ymd_H');
+    $tableRows[] = [
+        'checkbox' => sprintf('<input type="radio" name="version_url" value="manual"/>'),
+        'tag_name' => 'Manual',
+        'name' => 'If there are changes that are not suitable for full coverage, please check this box and make sure you have updated the code manually',
+        'published_at' => '---',
+    ];
     try {
         $versions = $update->listVersions();
-//        if (!empty($_SESSION[$cacheKkey])) {
-//            $update->doLog("get versions from session.");
-//            $versions = $_SESSION[$cacheKkey];
-//        } else {
-//            $_SESSION[$cacheKkey] = $versions;
-//        }
     } catch (\Exception $exception) {
-        $error = $exception->getMessage();
+        $update->doLog("can not fetch versions from github: " . $exception->getMessage());
     }
     if (!$isPost) {
         $versionHeader = [
@@ -51,23 +50,22 @@ if ($currentStep == 2) {
             $update->doLog("no .env file, release time is github original");
             $timezone = null;
         }
-        $tableRows[] = [
-            'checkbox' => sprintf('<input type="radio" name="version_url" value="manual"/>'),
-            'tag_name' => 'Manual',
-            'name' => 'If there are changes that are not suitable for full coverage, please check this box and make sure you have updated the code manually',
-            'published_at' => '---',
-        ];
-        $latestCommit = $update->getLatestCommit();
-        $time = \Carbon\Carbon::parse($latestCommit['commit']['committer']['date']);
-        if ($timezone) {
-            $time->tz = $timezone;
+
+        try {
+            $latestCommit = $update->getLatestCommit();
+            $time = \Carbon\Carbon::parse($latestCommit['commit']['committer']['date']);
+            if ($timezone) {
+                $time->tz = $timezone;
+            }
+            $tableRows[] = [
+                'checkbox' => sprintf('<input type="radio" name="version_url" value="development|%s"/>', $latestCommit['sha']),
+                'tag_name' => 'Latest development code',
+                'name' => "Development testing only! Latest commit：" . $latestCommit['commit']['message'],
+                'published_at' => $time->format('Y-m-d H:i:s'),
+            ];
+        } catch (\Exception $exception) {
+            $update->doLog("can not fetch latest commit from github: " . $exception->getMessage());
         }
-        $tableRows[] = [
-            'checkbox' => sprintf('<input type="radio" name="version_url" value="development|%s"/>', $latestCommit['sha']),
-            'tag_name' => 'Latest development code',
-            'name' => "Development testing only! Latest commit：" . $latestCommit['commit']['message'],
-            'published_at' => $time->format('Y-m-d H:i:s'),
-        ];
         foreach ($versions as $version) {
             if ($version['draft']) {
                 continue;