Ошибка при установке Android Studio с помощью umake

Я пытаюсь установить Android Studio с помощью umake с помощью команды

sudo umake android android-studio 

, и я получаю следующие ошибки:

Downloading and installing requirements
| ERROR: W:GPG error: http://download.opensuse.org/repositories/home:/olav-st/xUbuntu_16.04  Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1BE1E8D7A2B5E9D5, W:The repository 'http://download.opensuse.org/repositories/home:/olav-st/xUbuntu_16.04  Release' is not signed., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details., W:The repository 'http://ppa.launchpad.net/texlive-backports/ppa/ubuntu xenial Release' does not have a Release file., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details., E:Failed to fetch http://ppa.launchpad.net/texlive-backports/ppa/ubuntu/dists/xenial/main/binary-amd64/Packages  404  Not Found, E:Some index files failed to download. They have been ignored, or old ones used instead.
    100% 
#########################################################################
| ERROR: Package requirements can't be met: W:GPG error: http://download.opensuse.org/repositories/home:/olav-st/xUbuntu_16.04  Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1BE1E8D7A2B5E9D5, W:The repository 'http://download.opensuse.org/repositories/home:/olav-st/xUbuntu_16.04  Release' is not signed., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details., W:The repository 'http://ppa.launchpad.net/texlive-backports/ppa/ubuntu xenial Release' does not have a Release file., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details., E:Failed to fetch http://ppa.launchpad.net/texlive-backports/ppa/ubuntu/dists/xenial/main/binary-amd64/Packages  404  Not Found, E:Some index files failed to download. They have been ignored, or old ones used instead.

Как я могу решить эту проблему вопрос? Поиск в Google не помог.

umake версия: 16.11.1 на Ubuntu 16.04.1 LTS 64-бит

UPDATE (после ответа dgonzalez)

Я выполнил ваш ответ, и теперь ошибка изменилась с UPDATE (после ответа dgonzalez) на истекший ключ: