Err:13 http://download.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Packages
403 Forbidden
Fetched 120 kB in 3s (35.1 kB/s)
Reading package lists... Done
W: The repository 'http://download.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://download.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04/Packages 403 Forbidden
E: Some index files failed to download. They have been ignored, or old ones used instead.
I get the error above when trying to update - any ideas?