MC-23545: Customer attribute of type file doesn't display in Account Information after created

Author: OlgaVasyltsun

app/code/Magento/Customer/Controller/Account/EditPost.php

@@ -212,10 +212,12 @@ public function execute()
             );
 
             $attributeToDelete = $this->_request->getParam('delete_attribute_value');
-            $this->deleteCustomerFileAttribute(
-                $customerCandidateDataObject,
-                $attributeToDelete
-            );
+            if ($attributeToDelete !== null) {
+                $this->deleteCustomerFileAttribute(
+                    $customerCandidateDataObject,
+                    $attributeToDelete
+                );
+            }
 
             try {
                 // whether a customer enabled change email option