“Notice” error

Hi,

I’ve installed the plugin and now instead the web I have the following error message:
Notice: Trying to get property of non-object in /var/www/vhost/lumarseafood.com/home/html/new/wp-content/themes/virtue_premium/lib/template_hooks/page.php on line 47

I have the theme and all my plugins updated. I’ve deactivated all plugins (except Polylang) and theme. After that, I’ve activated Twenty Sixteen WordPress theme and then I’ve begun to activate everything. No problem with plugins. The problem appears when I activate the theme. My theme is Virtue Premium.

– Your permalinks settings: Day and name https://…/2016/09/20/pagina-ejemplo/
– If you are using a static front page: Yes, I am.
– Your Polylang settings: I haven’t change any setting yet.
– A link to your site: https://new.lumarseafood.com/
– If you detected a conflict with a theme or another plugin, a link where to download this theme or plugin: https://www.kadencethemes.com/product/virtue-premium-theme/

Thank you!