Warning: Cannot modify header information – headers already sent in

  • Resolved DeonCol

    (@deoncol)


    3 years, 9 months ago

    Good day, I keep having an intermittent issue. I changed some URLS and added a 301 redirect to each of them. Tested them and they work. However, now and then if I do a Google search and click on the page link I get this error – Warning: Cannot modify header information – headers already sent in /usr/www/users/wecleergnw/wp-includes/pluggable.php on line 1329 Warning: Cannot modify header information – headers already sent in /usr/www/users/wecleergnw/wp-includes/pluggable.php on line 1332

    I have not changed anything else. I have cleared cache on my browser, and cleared cache using Swift Performance.
    I also just checked one of the links (old link – https://weclean.co.za/locations/claremont/) in Redirection and it gave me this error -`Expected: 301 to https://weclean.co.za/locations/cleaning-services-claremont/

    Found: 200

    Agent: Not using Redirection`

    Please help. I am not a developer and do not know where to start looking.

Viewing 2 replies - 1 through 2 (of 2 total)
  • Plugin Author John Godley

    (@johnny5)

    It means that something on your site is outputting data too early, and this is then breaking when something (Redirection, I assume) is trying to change the HTTP response headers for the redirect.

    You will need to find what is outputting data. There isn’t an easy way to do this, but it is likely either another plugin, or your theme. You could try disabling things until the problem is fixed.

    Thread Starter DeonCol

    (@deoncol)

    Thank you for your response John Godley. I added the plugin called Query Monitor and it was showing an error from a Plugin called Really Simple SSL. I don’t really need it so I deactivated it and the problem seems to be resolved now.

Viewing 2 replies - 1 through 2 (of 2 total)
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