diff --git a/module/gitlab/lang/de.php b/module/gitlab/lang/de.php
index 5094d2c1ce..08f9783866 100644
--- a/module/gitlab/lang/de.php
+++ b/module/gitlab/lang/de.php
@@ -120,6 +120,7 @@ $lang->gitlab->apiError[] = 'avatar is invalid';
 $lang->gitlab->apiError[] = 'file format is not supported. Please try one of the following supported formats: image/png, image/jpeg, image/gif, image/bmp, image/tiff, image/vnd.microsoft.icon';
 $lang->gitlab->apiError[] = 'must not contain commonly used combinations of words and letters';
 $lang->gitlab->apiError[] = 'must be greater than or equal to 0';
+$lang->gitlab->apiError[] = '500 Internal Server Error';
 
 $lang->gitlab->errorLang[] = 'You cannot set Internal as its Visibility Level, if it is private in GitLab.';
 $lang->gitlab->errorLang[] = 'You cannot set Public as its Visibility Level, if it is private in GitLab.';
@@ -139,6 +140,7 @@ $lang->gitlab->errorLang[] = 'Avatar is invalid';
 $lang->gitlab->errorLang[] = 'File format is not supported. Please try one of the following supported formats: image/png, image/jpeg, image/gif, image/bmp, image/tiff, image/vnd.microsoft.icon';
 $lang->gitlab->errorLang[] = 'must not contain commonly used combinations of words and letters';
 $lang->gitlab->errorLang[] = 'must be greater than or equal to 0';
+$lang->gitlab->errorLang[] = '500 Internal Server Error';
 
 $lang->gitlab->errorResonse['Email has already been taken']    = 'Email has already been taken';
 $lang->gitlab->errorResonse['Username has already been taken'] = 'Username has already been taken';
diff --git a/module/gitlab/lang/en.php b/module/gitlab/lang/en.php
index 501e0742a5..28a04bf7d7 100644
--- a/module/gitlab/lang/en.php
+++ b/module/gitlab/lang/en.php
@@ -120,6 +120,7 @@ $lang->gitlab->apiError[] = 'avatar is invalid';
 $lang->gitlab->apiError[] = 'file format is not supported. Please try one of the following supported formats: image/png, image/jpeg, image/gif, image/bmp, image/tiff, image/vnd.microsoft.icon';
 $lang->gitlab->apiError[] = 'must not contain commonly used combinations of words and letters';
 $lang->gitlab->apiError[] = 'must be greater than or equal to 0';
+$lang->gitlab->apiError[] = '500 Internal Server Error';
 
 $lang->gitlab->errorLang[] = 'You cannot set Internal as its Visibility Level, if it is private in GitLab.';
 $lang->gitlab->errorLang[] = 'You cannot set Public as its Visibility Level, if it is private in GitLab.';
@@ -139,6 +140,7 @@ $lang->gitlab->errorLang[] = 'Avatar is invalid';
 $lang->gitlab->errorLang[] = 'File format is not supported. Please try one of the following supported formats: image/png, image/jpeg, image/gif, image/bmp, image/tiff, image/vnd.microsoft.icon';
 $lang->gitlab->errorLang[] = 'must not contain commonly used combinations of words and letters';
 $lang->gitlab->errorLang[] = 'must be greater than or equal to 0';
+$lang->gitlab->errorLang[] = '500 Internal Server Error';
 
 $lang->gitlab->errorResonse['Email has already been taken']    = 'Email has already been taken';
 $lang->gitlab->errorResonse['Username has already been taken'] = 'Username has already been taken';
diff --git a/module/gitlab/lang/fr.php b/module/gitlab/lang/fr.php
index 9bb09b3a3a..fbb08f9c2d 100644
--- a/module/gitlab/lang/fr.php
+++ b/module/gitlab/lang/fr.php
@@ -120,6 +120,7 @@ $lang->gitlab->apiError[] = 'avatar is invalid';
 $lang->gitlab->apiError[] = 'file format is not supported. Please try one of the following supported formats: image/png, image/jpeg, image/gif, image/bmp, image/tiff, image/vnd.microsoft.icon';
 $lang->gitlab->apiError[] = 'must not contain commonly used combinations of words and letters';
 $lang->gitlab->apiError[] = 'must be greater than or equal to 0';
+$lang->gitlab->apiError[] = '500 Internal Server Error';
 
 $lang->gitlab->errorLang[] = 'You cannot set Internal as its Visibility Level, if it is private in GitLab.';
 $lang->gitlab->errorLang[] = 'You cannot set Public as its Visibility Level, if it is private in GitLab.';
@@ -139,6 +140,7 @@ $lang->gitlab->errorLang[] = 'Avatar is invalid';
 $lang->gitlab->errorLang[] = 'File format is not supported. Please try one of the following supported formats: image/png, image/jpeg, image/gif, image/bmp, image/tiff, image/vnd.microsoft.icon';
 $lang->gitlab->errorLang[] = 'must not contain commonly used combinations of words and letters';
 $lang->gitlab->errorLang[] = 'must be greater than or equal to 0';
+$lang->gitlab->errorLang[] = '500 Internal Server Error';
 
 $lang->gitlab->errorResonse['Email has already been taken']    = 'Email has already been taken';
 $lang->gitlab->errorResonse['Username has already been taken'] = 'Username has already been taken';
diff --git a/module/gitlab/lang/zh-cn.php b/module/gitlab/lang/zh-cn.php
index 479e46fe6b..56ac7ef672 100644
--- a/module/gitlab/lang/zh-cn.php
+++ b/module/gitlab/lang/zh-cn.php
@@ -120,6 +120,7 @@ $lang->gitlab->apiError[] = 'avatar is invalid';
 $lang->gitlab->apiError[] = 'file format is not supported. Please try one of the following supported formats: image/png, image/jpeg, image/gif, image/bmp, image/tiff, image/vnd.microsoft.icon';
 $lang->gitlab->apiError[] = 'must not contain commonly used combinations of words and letters';
 $lang->gitlab->apiError[] = 'must be greater than or equal to 0';
+$lang->gitlab->apiError[] = '500 Internal Server Error';
 
 $lang->gitlab->errorLang[] = '私有分组的项目，可见性级别不能设为内部。';
 $lang->gitlab->errorLang[] = '私有分组的项目，可见性级别不能设为公开。';
@@ -139,6 +140,7 @@ $lang->gitlab->errorLang[] = '头像格式不正确';
 $lang->gitlab->errorLang[] = '文件格式不支持，请尝试以下格式：image/png,image/jpeg,image/gif,image/bmp,image/tiff,image/vnd.microsoft.icon';
 $lang->gitlab->errorLang[] = '不能使用常用的数字或字母组合';
 $lang->gitlab->errorLang[] = '必须大于等于0';
+$lang->gitlab->errorLang[] = '服务器返回错误：500';
 
 $lang->gitlab->errorResonse['Email has already been taken']    = '邮箱已存在';
 $lang->gitlab->errorResonse['Username has already been taken'] = '用户名已存在';
diff --git a/module/job/model.php b/module/job/model.php
index ccdc16fd6b..11c689ab11 100644
--- a/module/job/model.php
+++ b/module/job/model.php
@@ -417,14 +417,17 @@ class jobModel extends model
         /* Set pipeline params. */
         $customParams = json_decode($job->customParam);
         $variables    = array();
-        foreach($customParams as $paramName => $paramValue)
+        if($customParams)
         {
-            $variable = array();
-            $variable['key']           = $paramName;
-            $variable['value']         = $paramValue;
-            $variable['variable_type'] = "env_var";
+            foreach($customParams as $paramName => $paramValue)
+            {
+                $variable = array();
+                $variable['key']           = $paramName;
+                $variable['value']         = $paramValue;
+                $variable['variable_type'] = "env_var";
 
-            $variables[] = $variable;
+                $variables[] = $variable;
+            }
         }
         if(!empty($variables)) $pipelineParams->variables = $variables;
 
diff --git a/module/mr/model.php b/module/mr/model.php
index 1ceb8a7077..76238071d5 100644
--- a/module/mr/model.php
+++ b/module/mr/model.php
@@ -1,5 +1,8 @@
 <?php
 declare(strict_types=1);
+
+use function zin\import;
+
 /**
  * The model file of mr module of ZenTaoPMS.
  *
@@ -303,7 +306,11 @@ class mrModel extends model
 
         /* Exec Job */
         $needExecJob = isset($diff['targetBranch']) || isset($diff['jobID']) ? true : false;
-        if($needExecJob && isset($MR->jobID) && $MR->jobID) $this->execJob($MRID, (int)$MR->jobID);
+        if($needExecJob && isset($MR->jobID) && $MR->jobID)
+        {
+            $this->execJob($MRID, (int)$MR->jobID);
+            if(dao::isError()) return array('result' => 'fail', 'message' => import("\n", dao::getError()));
+        }
 
         /* Known issue: `reviewer_ids` takes no effect. */
         $rawMR = $this->apiUpdateMR($oldMR, $MR);