Web registration fails

Hello, suddenly the web registration is not working and gives the following error:

Fatal error: Uncaught Error: Call to a member function has_errors() on null in /furanet/sites/domain.com/web/htdocs/wp-includes/user.php:3154 Stack trace: #0 /furanet/sites/domain.com/web/htdocs/wp-content/plugins/theme-my-login/includes/actions.php(609): register_new_user(”, ”) #1 /furanet/sites/domain.com/web/htdocs/wp-includes/class-wp-hook.php(307): tml_registration_handler(”) #2 /furanet/sites/domain.com/web/htdocs/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(”, Array) #3 /furanet/sites/domain.com/web/htdocs/wp-includes/plugin.php(474): WP_Hook->do_action(Array) #4 /furanet/sites/domain.com/web/htdocs/wp-content/plugins/theme-my-login/includes/actions.php(376): do_action(‘tml_action_regi…’) #5 /furanet/sites/domain.com/web/htdocs/wp-includes/class-wp-hook.php(307): tml_action_handler(”) #6 /furanet/sites/domain.com/web/htdocs/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(false, Array) #7 /furanet/sites/domain in /furanet/sites/domain.com/web/htdocs/wp-includes/user.php on line 3154

I’m not sure if it would be from recently upgrading to the latest version of wordpress because nothing else has been updated.