Error using WP 2FA with Telegram with WP Telegram Login

If I enable WP Telegram two factor authentication and login with WP Telegram login, I receive this error:
class-wp-factor-telegram-plugin.php on line 158
If I login with username and password I receive the code to login and it works.
The complete error is:
Fatal error: Uncaught Error: Call to undefined function login_header() in /web/htdocs/www.mandriola.org/home/wp-parrocchia/wp-content/plugins/two-factor-login-telegram/includes/class-wp-factor-telegram-plugin.php:158 Stack trace: #0 /web/htdocs/www.mandriola.org/home/wp-parrocchia/wp-content/plugins/two-factor-login-telegram/includes/class-wp-factor-telegram-plugin.php(111): WP_Factor_Telegram_Plugin->login_html() #1 /web/htdocs/www.mandriola.org/home/wp-parrocchia/wp-content/plugins/two-factor-login-telegram/includes/class-wp-factor-telegram-plugin.php(208): WP_Factor_Telegram_Plugin->show_two_factor_login() #2 /web/htdocs/www.mandriola.org/home/wp-parrocchia/wp-includes/class-wp-hook.php(287): WP_Factor_Telegram_Plugin->tg_login() #3 /web/htdocs/www.mandriola.org/home/wp-parrocchia/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters() #4 /web/htdocs/www.mandriola.org/home/wp-parrocchia/wp-includes/plugin.php(478): WP_Hook->do_action() #5 /web/htdocs/www.mandriola.org/home/wp-parrocchia/wp-content/plugins/wptelegr in /web/htdocs/www.mandriola.org/home/wp-parrocchia/wp-content/plugins/two-factor-login-telegram/includes/class-wp-factor-telegram-plugin.php on line 158
Thank you