Fatal error: Uncaught Error: Call to a member function has_session() on null
in /home/mlboxstaging/public_html/wp-content/plugins/mylabbox/classes/class-partner.php on line 144

Call stack:

1. MyLabBox_Partner::establish_guest_session_on_register_page()
   wp-includes/class-wp-hook.php:310
2. WP_Hook::apply_filters()
   wp-includes/class-wp-hook.php:334
3. WP_Hook::do_action()
   wp-includes/plugin.php:517
4. do_action()
   wp-settings.php:632
5. require_once()
   wp-config.php:122
6. require_once()
   wp-load.php:50
7. require_once()
   wp-blog-header.php:13
8. require()
   index.php:17