How to remove the PHP warning error: Cannot modify header information

PHP warning: Cannot modify header information - headers already sent by (output started at /public_html/core/xpdo/xpdo.class.php:12

Something at your site is trying to add page-header information after the headers have already been sent to the browser.

We need more information before we can help you.

  • What version of MODX?
  • Have you made any changes lately, and if so what were they?
  • Is this happening in the front end of the Manager, or both?
  • What do you do to make it happen?
  • Is it happening on every page with every template, or is it limited to one page, or to pages that use a particular template?

Good afternoon. this error is gone. I don’t know what happened

Let’s hope it stays gone. :wink: