PHP Fatal error on plugins page

When viewing the plugins page, I’m getting this PHP Fatal error:

[13-Aug-2018 18:31:38 UTC] PHP Fatal error:  Uncaught Error: Cannot use object of type stdClass as array in /var/www/oag.oag/public/content/plugins/wp-private-content-plus/classes/class-wppcp-admin-stats.php:347
Stack trace:
#0 /var/www/oag.oag/public/content/plugins/wp-private-content-plus/classes/class-wppcp-admin-stats.php(49): WPPCP_Admin_Stats->get_widget_stats()
#1 /var/www/oag.oag/public/content/plugins/wp-private-content-plus/classes/class-wppcp-settings.php(1071): WPPCP_Admin_Stats->generate_stats()
#2 /var/www/oag.oag/public/wp/wp-includes/class-wp-hook.php(286): WPPCP_Settings->wppcp_deactivate_popup('')
#3 /var/www/oag.oag/public/wp/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array)
#4 /var/www/oag.oag/public/wp/wp-includes/plugin.php(453): WP_Hook->do_action(Array)
#5 /var/www/oag.oag/public/wp/wp-admin/admin-footer.php(72): do_action('admin_footer', '')
#6 /var/www/oag.oag/public/wp/wp-admin/plugins.php(576): include('/var/www/oag.oa...')
#7 {main}
  thrown in /var/www/oag.oag/public/content/plugins/wp-private-content-plus/classes/class-wppcp-admin-stats.php on line 347

WP 4.9.8
PHP 7.2.8
Apache 2.4.7
Ubuntu