Web GUI Disabled

[krypterro]

I have just got a new mail server setup with Roundcube, and once I login all the options are grayed out, and most the links do not work. This is on a fresh Ubuntu 16.04 server with Postfix, Dovecot, and MySQL/MariaDB, and Postfix and Dovecot seem to work fine (logs are clean). Does anyone seen this before? For example, in Settings, none of the 'Section' options do anything. I'm in the latest version of Firefox (62) on Mint Linux if that matters.

[krypterro]

In the rendered HTML I can see the buttons are disabled. Any idea how I screwed up the setup to cause such a state?

[JohnDoh]

What method did you use to install Roundcube? And what version? Check the browser's JS console for errors.