Crash in creating user

Error on creating user in multisite.

Stack trace:
#0 /home/public_html/wp-includes/pluggable.php(2578): clean_user_cache(NULL)
#1 /home/public_html/wp-content/plugins/create-user-with-password-multisite/php/cuwp.php(133): wp_set_password('NEWuserWITHpassword', NULL)
#2 /home/public_html/wp-includes/class-wp-hook.php(287): CUWP_Create_User_With_Password->cuwp_listen('')
#3 /home/public_html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters('', Array)
#4 /home/public_html/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#5 /home/public_html/wp-admin/admin.php(408): do_action('admin_action_cr...')
#6 /home/public_html/wp-admin/user-new.php(10): require_once('/home/waindivid...')
#7 {main}
  thrown in /home/public_html/wp-includes/user.php on line 1385

User seems to be created though they are unconfirmed. (any chance of adding a tick box to not send email and auto confirm?)