Support

When you use the Quick Setup Wizard, .htaccess Maker, or Configure WAF page in Admin Tools it tries to send all Super Users an email with troubleshooting information. There are two potential problems with this.

If Joomla hangs trying to send email because of a misconfiguration you mistakenly believe that the problem is with Admin Tools.

If you have invalid email addresses in other, possibly forgotten, Super User accounts Joomla will throw an exception. In some servers this may cause the site to appear to have stalled instead of showing an error page.

I have seen both of these problems several times.

First, go to System, Global Configuration, Server tab and click on Send Test Mail. If the site stalls, the problem is with the email configuration. Fix it, make sure it works (using the Send Test Mail button), and only then try to install and use Admin Tools.

If the email was sending correctly, try to check all Super User accounts. Invalid email addresses are a common mistake, and difficult to catch. Try deleting the email address of every Super User account and retype it manually. Except yours because you've already checked it works, since you are here after having made sure that the Send Test Email does work.