Error in Drupal 7 eval

When trying to add a new product to the site, an error (warning) appears that needs to be resolved, but where and how?

Notice: Trying to get property of non-object in function eval() (line 3 in file /home/*/*******/*************.com/public_html/sites/all/modules/contrib/views/plugins/views_plugin_argument_default_php.inc(50) : eval()'d code).