Thank you, registration is working. But the captcha is not displayed anyway. There is also another problem. After deleting the account, it redirects to the default registration page (wp-login.php). The setting “Anyone can register” is disabled. If you enable it, then after deleting the account, the redirect goes to the UM authorization form (everything is correct). The problem is solved with the help of another plugin (WP User Frontend), which specifies the setting “Login / Registration override” and selects the registration page with the UM form