Popliup Invalid argument supplied

  • Hi,
    first of all, compliment for the Poplium plug in. rellay great!

    When I use it I’ve got this problem which appears on the footer of my website:

    Warning: Invalid argument supplied for foreach() in /web/htdocs/www.joinki.it/home/wp-content/plugins/popliup/public/class-popliup-public.php on line 299

    any suggestion?

    the incriminated line is:
    foreach( $this->popup_instances as $popup_instance ){

    thanks alot!

    https://www.ads-software.com/plugins/popliup/

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