Support » Plugin: WP DoNotTrack » Problems with Facebook Mobile Browser

  • Hi,
    I have found this particular problem on my website. Maybe it is something that can be related to the plugin.

    Fatal error: Uncaught Error: Call to a member function clear() on boolean in /home/XXX/wp-content/plugins/wp-donottrack/wp-donottrack.php:188 Stack trace: #0 [internal function]: wp_donottrack_ob_filter('', 9) #1 /home/XXX/wp-includes/functions.php(3727): ob_end_flush() #2 /home/XXX/wp-includes/class-wp-hook.php(286): wp_ob_end_flush_all('') #3 /home/XXX/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters('', Array) #4 /home/XXX/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #5 /home/XXX/wp-includes/load.php(679): do_action('shutdown') #6 [internal function]: shutdown_action_hook() #7 {main} thrown in /home/XXX/wp-content/plugins/wp-donottrack/wp-donottrack.php on line 188

    I never had problems with the plugin.

    This Fatal Error was reported to me from a visitor who clicked the link on facebook.

    Maybe the Later WordPress Release 4.9 has changed something.

    I really don’t know.

    But I have thought that it was the case to report this particular problem to you.

    On mobile, it works on browsers. Just only when the link on the blog page is facebook this problem is visible. So, maybe there is something that is missing on the facebook and the plugin return this error.

    Kind regards

    G. Aloe

    The page I need help with: [log in to see the link]

Viewing 3 replies - 1 through 3 (of 3 total)
  • so do you have something (a plugin or a theme) on your site that renders different output for facebook?

    as a workaround can you try switching from “superclean” to “forced”?


    Thread Starter jscmal


    I switched from superclean to forced and I have got a couple of times a “502 bad error white page” on the first loading of the admin page on desktop. At the second loading of the page, it was loaded properly.

    … then later I cleaned and preloaded the cache.

    It worked.

    I switched again on superclean… and I cleaned and preloaded the cache again and it worked too.

    So, I can suppose that It was necessary to clean the cache on wp-rocket.

    wp-rocket creates separated caches for mobile and desktop. Recently WordPress and the Woocommerce Canvas Theme released new updates. Maybe, the cache was the problem.

    Anyway, I have seen this problem because a facebook user told me about it. I had no chance to check it intentionally by myself.

    Thank you very much for your support.

    Kind regards


    • This reply was modified 3 years, 11 months ago by jscmal.
    • This reply was modified 3 years, 11 months ago by jscmal.

    Interesting, thanks for the feedback @jscmal !

Viewing 3 replies - 1 through 3 (of 3 total)
  • The topic ‘Problems with Facebook Mobile Browser’ is closed to new replies.