diff --git a/src/jojoe77777/FormAPI/ModalForm.php b/src/jojoe77777/FormAPI/ModalForm.php
index 3f46c92..b008bee 100755
--- a/src/jojoe77777/FormAPI/ModalForm.php
+++ b/src/jojoe77777/FormAPI/ModalForm.php
@@ -23,9 +23,17 @@ public function __construct(?callable $callable) {
         $this->data["button2"] = "";
     }
 
-    public function processData(&$data) : void {
-        if(!is_bool($data)) {
-            throw new FormValidationException("Expected a boolean response, got " . gettype($data));
+    // The error related to the "Esc" key has been fixed
+   
+    public function processData(&$data): void
+    {
+        if ($data === null) {
+            $data = null; 
+            return;
+        }
+
+        if (!is_bool($data)) {
+            throw new FormValidationException("Expected an integer response, got " . gettype($data));
         }
     }