IE11 problem - "Cannot Modify Header Information"

Hello,

I am using a Child Theme with the Sparkling Theme. I am having a display problem in IE11. The blog displays properly in Firefox and Chrome.

The site is: http://blogs.bentley.edu/intheknowtest/

An error message displays at the top of the page:

Warning: Cannot modify header information - headers already sent by (output started at /nfs/c04/h02/mnt/85590/domains/blogs.bentley.edu/html/intheknowtest/wp-content/themes/sparkling/header.php:12) in /nfs/c04/h02/mnt/85590/domains/blogs.bentley.edu/html/intheknowtest/wp-content/themes/sparkling/header.php on line 23

Also, the page looks like it is trying to display a mobile version, even on a desktop. There are many things “off” with the display.

Thanks in advance for any help you can provide.

Lisa

Hi Lisa,

I hope you are well today and thank you for your questions.

An error message displays at the top of the page:

This is a simple PHP warning/notice and most of the time it doesn’t affect functionality of site so it is nothing to worry about!

Do you have WP_DEBUG set to true in your wp-config.php file?

If you do then please set it to false.
This will hide the warning messages and you will be able to use your site normally.

Also, the page looks like it is trying to display a mobile version, even on a desktop. There are many things “off” with the display.

Have you made any changes in the theme files?

This can be due to plugin conflict on your site so please try temporary deactivating all plugins and see whether everything works fine and then enable the plugins one by one to see which plugin is conflicting if any.

Kind Regards,
Movin

Hi Movin,

Thank you for the prompt response. As it turns out, it was a problem with Compatibility View. My company has compatibility view turned on by default for its intranet. A colleague mentioned he had run into this problem before. Once I turned it off all of the problems resolved.

Thank you so much for the assistance. This support forum has been very helpful!

You are most welcome here :slight_smile: