Ubuntu 19.04 (Disco Dingo) was released on 18 April 2019 and reached end of public support on 23 January 2020. Questions specific to this release would be generally off-topic and are likely to be closed as such.
Ubuntu 19.04 is based on the Linux release series 5.0. Desktop has been upgraded to GNOME 3.32. Ubuntu 19.04 was supported for 9 months. If you need Long Term Support, it is recommended you use Ubuntu 18.04 LTS instead.