diff --git a/rule/ftpsyncfiles/rule_class.php b/rule/ftpsyncfiles/rule_class.php
index c6dc45c6..bd32fef4 100644
--- a/rule/ftpsyncfiles/rule_class.php
+++ b/rule/ftpsyncfiles/rule_class.php
@@ -75,7 +75,7 @@ class datalynx_rule_ftpsyncfiles extends datalynx_rule_base {
      * @var mixed
      */
     private array $sftpsetting;
-    private int $filefieldid;
+    private ?int $filefieldid;
     private array $files;
 
     /**
@@ -86,12 +86,14 @@ class datalynx_rule_ftpsyncfiles extends datalynx_rule_base {
      */
     public function __construct($df = 0, $rule = 0) {
         parent::__construct($df, $rule);
-        $this->sftpsetting = unserialize($this->rule->param2);
-        $this->sftpserver = $this->sftpsetting['sftpserver'];
-        $this->sftpport = $this->sftpsetting['sftpport'];
-        $this->sftpusername = $this->sftpsetting['sftpusername'];
-        $this->sftppassword = $this->sftpsetting['sftppassword'];
-        $this->sftppath = $this->sftpsetting['sftppath'];
+        if (isset($this->rule->param2)) {
+            $this->sftpsetting = unserialize($this->rule->param2);
+            $this->sftpserver = $this->sftpsetting['sftpserver'];
+            $this->sftpport = $this->sftpsetting['sftpport'];
+            $this->sftpusername = $this->sftpsetting['sftpusername'];
+            $this->sftppassword = $this->sftpsetting['sftppassword'];
+            $this->sftppath = $this->sftpsetting['sftppath'];
+        }
         $this->matchingfield = $this->rule->param7;
         $this->teammemberfieldid = $this->rule->param8;
         $this->authorid = $this->rule->param9;
diff --git a/rule/ftpsyncfiles/rule_form.php b/rule/ftpsyncfiles/rule_form.php
index 867811dc..76ded2e4 100644
--- a/rule/ftpsyncfiles/rule_form.php
+++ b/rule/ftpsyncfiles/rule_form.php
@@ -116,21 +116,23 @@ public function data_preprocessing(&$data) {
     /**
      */
     public function set_data($data) {
-        $sftpsetting = unserialize($data->param2);
-        if (isset($sftpsetting['sftpserver'])) {
-            $data->sftpserver = $sftpsetting['sftpserver'];
-        }
-        if (isset($sftpsetting['sftpport'])) {
-            $data->sftpport = $sftpsetting['sftpport'];
-        }
-        if (isset($sftpsetting['sftpusername'])) {
-            $data->sftpusername = $sftpsetting['sftpusername'];
-        }
-        if (isset($sftpsetting['sftppassword'])) {
-            $data->sftppassword = $sftpsetting['sftppassword'];
-        }
-        if (isset($sftpsetting['sftppath'])) {
-            $data->sftppath = $sftpsetting['sftppath'];
+        if (!empty($data->param2)) {
+            $sftpsetting = unserialize($data->param2);
+            if (isset($sftpsetting['sftpserver'])) {
+                $data->sftpserver = $sftpsetting['sftpserver'];
+            }
+            if (isset($sftpsetting['sftpport'])) {
+                $data->sftpport = $sftpsetting['sftpport'];
+            }
+            if (isset($sftpsetting['sftpusername'])) {
+                $data->sftpusername = $sftpsetting['sftpusername'];
+            }
+            if (isset($sftpsetting['sftppassword'])) {
+                $data->sftppassword = $sftpsetting['sftppassword'];
+            }
+            if (isset($sftpsetting['sftppath'])) {
+                $data->sftppath = $sftpsetting['sftppath'];
+            }
         }
         parent::set_data($data);
     }