Fatal error

I received this error when updating today:

Fatal `error: Uncaught Error: Call to undefined function WPWHPRO() in /home/[snip]/public_html/mcht/wp-content/plugins/wp-mailto-links/core/includes/partials/widgets/main.php:99
Stack trace:
#0 /home/[snip]/public_html/mcht/wp-content/plugins/wp-mailto-links/core/includes/partials/wpmt-page-display.php(54): include()
#1 /home/[snip]/public_html/mcht/wp-content/plugins/wp-mailto-links/core/includes/classes/class-wp-mailto-links-run-admin.php(142): include(‘/home/[snip]/…’)
#2 /home/[snip]/public_html/mcht/wp-includes/class-wp-hook.php(286): WP_Mailto_Links_Run->render_admin_menu_page(”)
#3 /home/[snip]/public_html/mcht/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(”, Array)
#4 /home/[snip]/public_html/mcht/wp-includes/plugin.php(465): WP_Hook->do_action(Array)
#5 /home/[snip]/public_html/mcht/wp-admin/admin.php(253): do_action(‘settings_page_w…’)
#6 /home/[snip]/public_html/mcht/wp-admin/options-general.php(10): require_once(‘/home/[snip]/…’)
#7 {main}
thrown in /home/[snip]/public_html/mcht/wp-content/plugins/wp-mailto-links/core/includes/partials/widgets/main.php on line 99`