E: Failed to fetch https://atlassian.artifactoryonline.com/atlassian/hipchat-apt-client/dists/xenial/Release  No Hash entry in Release file /var/lib/apt/lists/partial/atlassian.artifactoryonline.com_atlassian_hipchat-apt-client_dists_xenial_Release which is considered strong enough for security purposes
E: Some index files failed to download. They have been ignored, or old ones used instead.