Hi,

Regards,

ken 

Please try the way below, it will fix the issue.

1.    Create a new page with any name, in my example, I name it to “test_post.php”, and use the same editor code as your editor page. (only the editor code)

For example, at my end, I used the code below in it.

<?php require_once "richtexteditor/include_rte.php" ?>

<?php   

$rte=new RichTextEditor();   

$rte->ID="Editor1";    

$rte->MvcInit();

?>   

2.    Set property AjaxPostbackUrl for your editor (in the old editor page), like below. The url should set to the new page above.

$rte->AjaxPostbackUrl="test_post.php";