Unable to Change the Domain within web control panel

Recently, one of our clients attempted to add an email address account.

However, when they attempted to change the domain in the form to associate it with a specific domain, the original domain remained selected in the field above. This type of behavior could occur if a browser extension is interfering with page functionality. Usually, extensions that block advertising or scripting in the browser can cause such issues.

You could attempt to add the email address with the currently selected domain. If it doesn't function as expected, we recommend disabling any extensions in your browser for that specific webpage. Alternatively, you could try using a different browser profile or another browser without any installed extensions.