Hit:23 http://ppa.launchpad.net/wine/wine-builds/ubuntu xenial InRelease
Fetched 205 kB in 0s (260 kB/s)
Reading package lists... Done
E: Failed to fetch http://debs.ubuntu.com/dists/xenial/InRelease  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
E: Failed to fetch http://debs.ubuntu.com/dists/xenial-security/InRelease  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
E: Failed to fetch http://debs.ubuntu.com/dists/xenial-updates/InRelease  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
E: Failed to fetch http://debs.ubuntu.com/dists/xenial-proposed/InRelease  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
E: Some index files failed to download. They have been ignored, or old ones used instead.