Hello, can upgrading the mail server to version 4.7 solve the problem of being unable to click?
check if the configuration of roundcube is correct? Replace 135roundcubemail.com with your domain name
Modify this file:
/www/wwwroot/135roundcubemail.com/config/config.inc.php
Add the following:
$config['enable_installer'] = true;
Then browser access: http://135roundcubemail.com/installer/?_step=1
Final test setup
patdevs