Hello,
Thanks for providing the screenshot. We can see that the SP Page Builder AJAX request is returning an HTTP 500 error:
administrator/index.php?option=com_sppagebuilder&task=/editor.pages&id=1
The Axios error shown in the browser is a consequence of the server returning HTTP 500. We therefore need to check the underlying Joomla/PHP error rather than the JavaScript itself.
Could you please provide the Joomla error log and PHP/LiteSpeed error log from the exact time when the error occurs?
Alternatively, if this is a staging site, please temporarily enable Joomla Debug System and Error Reporting: Maximum, reproduce the issue once, and send us the resulting error message.
This will allow us to identify the exact PHP/database exception causing the SP Page Builder request to fail.
Thanks.