FATAL error upon upgrade to 2.0

Getting critical error after upgrading. Has brought my whole site down. Please sort as a matter of priority.

[10/03/2021:17:58:43 +0000] AH01071: Got error 'PHP message: PHP Fatal error:  Uncaught Error: Call to a member function get_user_likes_count() on bool in /var/www/html/wp-content/plugins/um-forumwp/includes/core/class-forumwp-profile.php:109\nStack trace:\n#0 /var/www/html/wp-includes/class-wp-hook.php(287): um_ext\\um_forumwp\\core\\ForumWP_Profile->check_profile_tab_privacy(Array)\n#1 /var/www/html/wp-includes/plugin.php(212): WP_Hook->apply_filters(Array, Array)\n#2 /var/www/html/wp-content/plugins/ultimate-member/includes/core/class-profile.php(280): apply_filters('um_user_profile...', Array)\n#3 /var/www/html/wp-content/plugins/ultimate-member/includes/core/class-profile.php(295): um\\core\\Profile->tabs_active()\n#4 /var/www/html/wp-includes/class-wp-hook.php(287): um\\core\\Profile->active_tab('')\n#5 /var/www/html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array)\n#6 /var/www/html/wp-includes/plugin.php(484): WP_Hook->do_action(Array)\n#7 /var/www/html/wp-includes/template-loader.php(13): do_action(