diff --git a/module/install/control.php b/module/install/control.php
index 0db1e384e3..0c03bed939 100644
--- a/module/install/control.php
+++ b/module/install/control.php
@@ -120,13 +120,13 @@ class install extends control
     {
         if(!empty($_POST))
         {
-
-            $myConfig = '';
-            foreach($_POST as $key => $value) $myConfig .= ",{$key}={$value}";
-            $myConfig = urlencode(trim($myConfig, ','));
-            return $this->send(array('result' => 'success', 'message' => $this->lang->saveSuccess, 'load' => inlink('step3', "myConfig={$myConfig}")));
             $return = $this->install->checkConfig();
             if($return->result != 'ok') return $this->send(array('result' => 'fail', 'callback' => "zui.Modal.alert({icon: 'icon-exclamation-sign', size: 'sm', iconClass: 'text-4xl text-warning',  message: '" . str_replace("'", '"', $return->error) . "'})"));
+
+            $myConfig = array();
+            foreach($_POST as $key => $value) $myConfig[$key] = $value;
+            $this->session->set('myConfig', $myConfig);
+            return $this->send(array('result' => 'success', 'message' => $this->lang->saveSuccess, 'load' => inlink('step3')));
         }
         $dbHost = $dbPort = $dbName = $dbUser = $dbPassword = '';
 
@@ -153,12 +153,13 @@ class install extends control
      * @access public
      * @return void
      */
-    public function step3($myConfig = '')
+    public function step3()
     {
-        $myConfig = urldecode($myConfig);
-        $myConfig = str_replace(array(',', ' '), array('&', ''), $myConfig);
-        parse_str($myConfig, $myConfigOutput);
-
+        if(!empty($_POST))
+        {
+            if(!isset($this->config->installed) || !$this->config->installed) return $this->send(array('result' => 'fail', 'message' => $this->lang->install->errorNotSaveConfig));
+            return $this->send(array('result' => 'success', 'message' => '', 'load' => inlink('step4')));
+        }
         /* Set the session save path when the session save path is null. */
         $customSession = false;
         $checkSession  = ini_get('session.save_handler') == 'files';
@@ -189,7 +190,7 @@ class install extends control
         $this->view->config        = $this->config;
         $this->view->title         = $this->lang->install->saveConfig;
         $this->view->customSession = $customSession;
-        $this->view->myConfig      = $myConfigOutput;
+        $this->view->myConfig      = $this->session->myConfig;
         $this->display();
     }
 
@@ -205,10 +206,11 @@ class install extends control
         {
             $this->loadModel('setting')->setItem('system.common.global.mode', $this->post->mode); // Update mode.
             $this->loadModel('custom')->disableFeaturesByMode($this->post->mode);
-            return $this->send(array('load' => inlink('step5')));
+            return $this->send(array('result' => 'success', 'load' => inlink('step5')));
         }
 
-        if(!isset($this->config->installed) or !$this->config->installed)
+        $this->view->title = $this->lang->install->selectMode;
+        if(!isset($this->config->installed) || !$this->config->installed)
         {
             $this->view->error = $this->lang->install->errorNotSaveConfig;
             $this->display();
@@ -219,7 +221,6 @@ class install extends control
 
             list($disabledFeatures, $enabledScrumFeatures, $disabledScrumFeatures) = $this->loadModel('custom')->computeFeatures();
 
-            $this->view->title                 = $this->lang->install->selectMode;
             $this->view->edition               = $this->config->edition;
             $this->view->disabledFeatures      = $disabledFeatures;
             $this->view->enabledScrumFeatures  = $enabledScrumFeatures;
diff --git a/module/install/lang/de.php b/module/install/lang/de.php
index 88c8ef5bdc..1e674633c1 100644
--- a/module/install/lang/de.php
+++ b/module/install/lang/de.php
@@ -158,6 +158,7 @@ $lang->install->saveConfig         = 'Konfiguration speichern';
 $lang->install->save2File          = '<div class="text-warning">Kopieren Sie den Inhalt aus der Textbox und speichern Sie diesen als "<strong> %s </strong>". Sie können die Konfiguration später ändern.</div>';
 $lang->install->saved2File         = 'Die Konfigurationsdatei wurde gespeichert unter " <strong>%s</strong> ". Sie können die Konfiguration später ändern.';
 $lang->install->errorNotSaveConfig = 'Die Konfigurationsdatei wurde nicht gespeichert.';
+$lang->install->errorNotInitConfig = 'The configuration has not been created.';
 
 global $app;
 $lang->install->CSRFNotice = "CSRF defense has been enabled in the system. If you don't need it, contact the administrator to disable it manually in the {$app->basePath}config/config.php file.";
diff --git a/module/install/lang/en.php b/module/install/lang/en.php
index 206ecc4673..263eeb67a2 100644
--- a/module/install/lang/en.php
+++ b/module/install/lang/en.php
@@ -158,6 +158,7 @@ $lang->install->saveConfig         = 'Save config file';
 $lang->install->save2File          = '<div class="text-warning">Copy the content in the text box above and save it to "<strong> %s </strong>". You can change this configuration file later.</div>';
 $lang->install->saved2File         = 'The configuration file has been saved to " <strong>%s</strong> ". You can change this file later.';
 $lang->install->errorNotSaveConfig = 'The configuration file is not saved.';
+$lang->install->errorNotInitConfig = 'The configuration has not been created.';
 
 global $app;
 $lang->install->CSRFNotice = "CSRF defense has been enabled in the system. If you don't need it, contact the administrator to disable it manually in the {$app->basePath}config/config.php file.";
diff --git a/module/install/lang/fr.php b/module/install/lang/fr.php
index 8bdf8e6e04..fdaad82cc6 100644
--- a/module/install/lang/fr.php
+++ b/module/install/lang/fr.php
@@ -158,6 +158,7 @@ $lang->install->saveConfig         = 'Sauver config';
 $lang->install->save2File          = '<div class="text-warning">Copiez le contenu dans la zone de texte ci-dessus et enregistrez-le dans "<strong> %s </strong>". Vous pourrez modifier ce fichier de configuration ultérieurement.</div>';
 $lang->install->saved2File         = 'Le fichier de configuration a été enregistré dans " <strong>%s</strong> ". Vous pouvez modifier ce fichier ultérieurement.';
 $lang->install->errorNotSaveConfig = "Le fichier de configuration n'est pas enregistré.";
+$lang->install->errorNotInitConfig = 'The configuration has not been created.';
 
 global $app;
 $lang->install->CSRFNotice = "CSRF defense has been enabled in the system. If you don't need it, contact the administrator to disable it manually in the {$app->basePath}config/config.php file.";
diff --git a/module/install/lang/zh-cn.php b/module/install/lang/zh-cn.php
index c17d9ebfe4..c1120dcaf5 100644
--- a/module/install/lang/zh-cn.php
+++ b/module/install/lang/zh-cn.php
@@ -158,6 +158,7 @@ $lang->install->saveConfig         = '保存配置文件';
 $lang->install->save2File          = '<div class="text-warning">拷贝上面文本框中的内容，将其保存到 "<strong> %s </strong>"中。您以后还可继续修改此配置文件。</div>';
 $lang->install->saved2File         = '配置信息已经成功保存到" <strong>%s</strong> "中。您后面还可继续修改此文件。';
 $lang->install->errorNotSaveConfig = '还没有保存配置文件';
+$lang->install->errorNotInitConfig = '还没有生成配置文件';
 
 global $app;
 $lang->install->CSRFNotice = "系统已开启了CSRF的防御，如需关闭，请联系管理员到{$app->basePath}config/config.php文件中手动关闭。";
diff --git a/module/install/ui/step3.html.php b/module/install/ui/step3.html.php
index f3f12a0920..0d2e9ed5e1 100644
--- a/module/install/ui/step3.html.php
+++ b/module/install/ui/step3.html.php
@@ -11,6 +11,14 @@ declare(strict_types=1);
 namespace zin;
 
 set::zui(true);
+
+if(empty($myConfig))
+{
+    h::js("zui.Modal.alert('{$lang->install->errorNotInitConfig}').then((res) => {openUrl('" . inlink('step2') . "')});");
+    render('pagebase');
+    return;
+}
+
 $configContent = <<<EOT
 <?php
 \$config->installed       = true;
@@ -73,13 +81,22 @@ div
             cell
             (
                 setClass('text-center'),
-                btn
+                form
                 (
-                    setClass('px-6'),
-                    set::url(inlink('step4')),
-                    set::type('primary'),
-                    $lang->install->next,
-                ),
+                    set::actions(array()),
+                    input
+                    (
+                        set::name('hidden'),
+                        set::type('hidden'),
+                    ),
+                    btn
+                    (
+                        setClass('px-6'),
+                        set::type('primary'),
+                        set::btnType('submit'),
+                        $lang->install->next,
+                    ),
+                )
             ),
         ),
     ),
diff --git a/module/install/ui/step4.html.php b/module/install/ui/step4.html.php
index ed5a1dc5cc..c1a46c6ddb 100644
--- a/module/install/ui/step4.html.php
+++ b/module/install/ui/step4.html.php
@@ -10,6 +10,15 @@ declare(strict_types=1);
  */
 namespace zin;
 
+set::zui(true);
+
+if(isset($error))
+{
+    h::js("zui.Modal.alert('{$lang->install->errorNotSaveConfig}').then((res) => {openUrl('" . inlink('step3') . "')});");
+    render('pagebase');
+    return;
+}
+
 $trs = array();
 foreach($disabledFeatures as $feature)
 {
@@ -68,7 +77,6 @@ foreach($config->custom->allFeatures as $feature)
     );
 }
 
-set::zui(true);
 div
 (
     set::id('main'),