Upgrade to 3.6.1

kirby/config/fields/list.php

@@ -11,7 +11,7 @@ return [
     ],
     'computed' => [
         'value' => function () {
-            return trim($this->value);
+            return trim($this->value ?? '');
         }
     ]
 ];

kirby/config/fields/textarea.php

@@ -27,7 +27,7 @@ return [
          * Sets the default text when a new page/file/user is created
          */
         'default' => function (string $default = null) {
-            return trim($default);
+            return trim($default ?? '');
         },
 
         /**
@@ -81,7 +81,7 @@ return [
         },
 
         'value' => function (string $value = null) {
-            return trim($value);
+            return trim($value ?? '');
         }
     ],
     'api' => function () {

kirby/config/fields/writer.php

@@ -29,7 +29,8 @@ return [
     ],
     'computed' => [
         'value' => function () {
-            return Sane::sanitize(trim($this->value), 'html');
+            $value = trim($this->value ?? '');
+            return Sane::sanitize($value, 'html');
         }
     ],
 ];