Oracle JDK 11 is NOT installed. rm -f /etc/apt/source.list.d/webupd8team-ubuntu-java-focal.list sudo add-apt-repository --remove ppa:webupd8team/java sudo rm /var/lib/dpkg/info/oracle-java11-installer-local.postinst -f sudo apt update && sudo apt install locales ERROR: launchpadlib 1.10.13 requires testresources, which is not installed.