diff --git a/app/Http/Requests/SettingsSamlRequest.php b/app/Http/Requests/SettingsSamlRequest.php
index 8f02d64f0..2ab876141 100644
--- a/app/Http/Requests/SettingsSamlRequest.php
+++ b/app/Http/Requests/SettingsSamlRequest.php
@@ -62,7 +62,7 @@ class SettingsSamlRequest extends FormRequest
             $custom_privateKey = '';
             $custom_x509certNew = '';
             if (! empty($this->input('saml_custom_settings'))) {
-                $req_custom_settings = preg_split('/\r\n|\r|\n/', $this->input('saml_custom_settings'));
+                $req_custom_settings = preg_split('/\r\n|\r|\n/', $this->input('saml_custom_settings', ''));
                 $custom_settings = [];
 
                 foreach ($req_custom_settings as $custom_setting) {
diff --git a/app/Models/CustomField.php b/app/Models/CustomField.php
index dfa497136..81eff9b4c 100644
--- a/app/Models/CustomField.php
+++ b/app/Models/CustomField.php
@@ -307,7 +307,7 @@ class CustomField extends Model
     public function formatFieldValuesAsArray()
     {
         $result = [];
-        $arr = preg_split('/\\r\\n|\\r|\\n/', $this->field_values);
+        $arr = preg_split('/\\r\\n|\\r|\\n/', $this->field_values ?? '');
 
         if (($this->element != 'checkbox') && ($this->element != 'radio')) {
             $result[''] = 'Select '.strtolower($this->format);
diff --git a/app/Services/Saml.php b/app/Services/Saml.php
index 860ec7617..222c2c2ea 100644
--- a/app/Services/Saml.php
+++ b/app/Services/Saml.php
@@ -209,7 +209,7 @@ class Saml
                 }
             }
 
-            $custom_settings = preg_split('/\r\n|\r|\n/', $setting->saml_custom_settings);
+            $custom_settings = preg_split('/\r\n|\r|\n/', $setting->saml_custom_settings ?? '');
             if ($custom_settings) {
                 foreach ($custom_settings as $custom_setting) {
                     $split = explode('=', $custom_setting, 2);