PHP error monitoring

We use New Relic for monitoring our webistes. On the websie with the wpLike2Get plugin we get every hour PHP errors.

E_WARNING: Creating default object from empty value

Sample stack trace
…e/domains/**/public_html/wp-content/plugins/wplike2get/wpLike2Get.php (119)
…e/domains/***/public_html/wp-content/plugins/wplike2get/wpLike2Get.php (84)
in wplike2get_setup called at ? (?)
…alled at /home/***/domains/***/public_html/wp-includes/plugin.php (406)
…ction called at /home/****/domains/***/public_html/wp-settings.php (211)
…re_once called at /home/****/domains/***/public_html/wp-config.php (94)
…uire_once called at /home/****/domains/***/public_html/wp-load.php (29)
…lled at /home/***/domains/****/public_html/wp-admin/admin-ajax.php (20)

http://wordpress.org/plugins/wplike2get/