Do you experience problems during downloading?
Check your connection in Status and Interface settings window.
Use Test Server in Config > Servers.
We will probably ask you to do a test using only basic settings.
Do you experience problems during repair or unpacking?
Enable +Debug logging in the Status and Interface settings window and share the relevant parts of the log here using [ code ] sections.
W: The repository 'http://ppa.launchpad.net/jcfp/nobetas/ubuntu xenial 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.
I ran the repository add and the gpg key was added
gpg: keyring `/tmp/tmpbfbtls4w/secring.gpg' created
gpg: keyring `/tmp/tmpbfbtls4w/pubring.gpg' created
gpg: requesting key 4BB9F05F from hkp server keyserver.ubuntu.com
gpg: /tmp/tmpbfbtls4w/trustdb.gpg: trustdb created
gpg: key 4BB9F05F: public key "Launchpad PPA for jcfp" imported
gpg: Total number processed: 1
gpg: imported: 1 (RSA: 1)
OK
Thanks for letting us know. That 'repo does not have a Release file' thing tends to show up when there's some kind of client side network failure, I guess squid-deb-proxy preventing access to ppa.launchpad.net is a somewhat more creative version of that with the same effect.