Ubuntu 18.04 environmental issues

This problem occurs when I install tup.

 Unofficial package for the Tup build system

 More info: https://launchpad.net/~jonathonf/+archive/ubuntu/tup
Press [ENTER] to continue or Ctrl-c to cancel adding it.

Hit:1 http://us.archive.ubuntu.com/ubuntu bionic InRelease                                                                                    
Hit:2 http://security.ubuntu.com/ubuntu bionic-security InRelease                                                                             
Ign:3 http://ppa.launchpad.net/jonathonf/tup/ubuntu bionic InRelease                          
Hit:4 http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease                                  
Hit:5 http://us.archive.ubuntu.com/ubuntu bionic-backports InRelease                                
Hit:6 http://ppa.launchpad.net/team-gcc-arm-embedded/ppa/ubuntu bionic InRelease
_**Err:7 http://ppa.launchpad.net/jonathonf/tup/ubuntu bionic Release**_
_**  404  Not Found [IP: 80]**_
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/jonathonf/tup/ubuntu bionic Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

Has been resolved ubuntu18.04 no tup source

Just updated my laptop to ubuntu 18.04
Have the same problem. Still no sources for tup.
How can we solve this. Do I need to go back to older ubuntu.
Or build tup for source, is not working yet have missing packages

Fixed the problem install libfuse-dev and tup will build

It should be possible to work around this by using the repository of an older distribution.

Based on [1] you can try to edit /etc/apt/sources.list. I don’t have an Ubuntu machine with root access at the moment so I can’t check but see if there’s a line related to the tup PPA. If you find it, change bionic to xenial.

Meanwhile @madcowswe mailed the maintainer of the package to ask if he could update it.

[1] https://www.linuxquestions.org/questions/linux-newbie-8/ubuntu-how-to-install-package-from-older-distro's-ppa-4175598045/

The guy updated his PPA now, so I think it will work on 18.04 from now on.