Impossible to activate

Hi!

I deactivated the plugin WP-Live Chat by 3CX , to update he plugin and WordPress. After that I tried to reactivate the plugin but I got the following error message I attach. Can you help me?

Kind regards.

Fatal error: Uncaught Error: Call to undefined method TCXUpdater::wplc_upgrade_tables_to_utf8mb4() in /web/htdocs/www.veritasinvestigazioni.it/home/wp-content/plugins/wp-live-chat-support/includes/wplc_updater.php:47 Stack trace: #0 /web/htdocs/www.veritasinvestigazioni.it/home/wp-content/plugins/wp-live-chat-support/includes/wplc_activator.php(24): TCXUpdater->versionMigration() #1 /web/htdocs/www.veritasinvestigazioni.it/home/wp-includes/class-wp-hook.php(303): wplc_activate() #2 /web/htdocs/www.veritasinvestigazioni.it/home/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters() #3 /web/htdocs/www.veritasinvestigazioni.it/home/wp-includes/plugin.php(470): WP_Hook->do_action() #4 /web/htdocs/www.veritasinvestigazioni.it/home/wp-admin/plugins.php(193): do_action() #5 {main} thrown in /web/htdocs/www.veritasinvestigazioni.it/home/wp-content/plugins/wp-live-chat-support/includes/wplc_updater.php on line 47