Warning: Creating default object from empty

i am reciving this error on unit page what is the problem :
Warning: Creating default object from empty value in /home/fumahtay/public_html/wp-content/plugins/coursepress/includes/classes/class.shortcodes.php on line 3091

the page is :

  • Patrick
    • Support Monkey

    Hi there @iTstar

    Welcome to WPMU DEV, glad to have you aboard!

    That looks like a cache issue to me. Please deactivate your cache plugin while configuring things on your site.

    Honestly, a cache plugin should be the very last thing you configure on your site, after everything else is done and you're satisfied with how things look and work.

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