Error on update

[Moltke]

[member=8978]mrgnu[/member] If you copy/paste this link  'http://ppa.launchpad.net/ubuntu-sdk-team/ppa/ubuntu bionic Release' in your browser you'll notice it gives a 404 error, in fact as you just noticed the bionic release ins't even taken as part of the link, however, if you delete the "bionic Release" it takes you here http://ppa.launchpad.net/ubuntu-sdk-team...ntu/dists/ to find out that there's not bionic release in there but instead will see this



So I think you should comment out or disable that ppa and you should be fine.

Hope this helps!