Error

Hi, I have had to switch off the plugin,
because of the following error message:

Warning: require_once(/web/htdocs/www.farmagensonline.it/home/wp-content/plugins/user-verification/includes/functions-mail-otp.php): failed to open stream: No such file or directory in /web/htdocs/www.farmagensonline.it/home/wp-content/plugins/user-verification/user-verification.php on line 106

Fatal error: require_once(): Failed opening required '/web/htdocs/www.farmagensonline.it/home/wp-content/plugins/user-verification/includes/functions-mail-otp.php' (include_path='.:/php7.4/lib/php') in /web/htdocs/www.farmagensonline.it/home/wp-content/plugins/user-verification/user-verification.php on line 106

Could you please tell me how to sove?
Thank you,
Giulia