The repository does not have a Release file

Asked by ehsan benabbas on 2019-08-11

Hello everyone,

I had installed yade-2019-07-08.git-e27605e , the source code version, and using ubunu 18.04 on a virtual machine software called VMWare. my host OS for VMWare is Windows 10 and my linux (Ubuntu 18.04) has been install on VMWare.

I removed my Yade and now want to install it again. When I use the command "sudo apt-get update", I get the following error:

ehsan@ehsan:~$ sudo apt-get update
[sudo] password for ehsan:
Get:1 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
Hit:2 http://ppa.launchpad.net/atareao/telegram/ubuntu bionic InRelease
Hit:3 http://ca.archive.ubuntu.com/ubuntu bionic InRelease
Get:4 http://ca.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Get:5 http://ppa.launchpad.net/js-reynaud/ppa-kicad/ubuntu bionic InRelease [15.4 kB]
Get:6 http://ca.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Ign:7 http://ppa.launchpad.net/yade-users/external/ubuntu bionic InRelease
Get:8 http://security.ubuntu.com/ubuntu bionic-security/main amd64 DEP-11 Metadata [22.7 kB]
Get:9 http://security.ubuntu.com/ubuntu bionic-security/main DEP-11 64x64 Icons [31.7 kB]
Err:10 http://ppa.launchpad.net/yade-users/external/ubuntu bionic Release
  404 Not Found [IP: 91.189.95.83 80]
Get:11 http://security.ubuntu.com/ubuntu bionic-security/universe amd64 DEP-11 Metadata [42.0 kB]
Get:12 http://security.ubuntu.com/ubuntu bionic-security/universe DEP-11 48x48 Icons [16.4 kB]
Get:13 http://security.ubuntu.com/ubuntu bionic-security/universe DEP-11 64x64 Icons [111 kB]
Get:14 http://security.ubuntu.com/ubuntu bionic-security/multiverse amd64 DEP-11 Metadata [2,464 B]
Get:15 http://ppa.launchpad.net/js-reynaud/ppa-kicad/ubuntu bionic/main i386 Packages [7,808 B]
Get:16 http://ca.archive.ubuntu.com/ubuntu bionic-updates/main amd64 DEP-11 Metadata [282 kB]
Get:17 http://ppa.launchpad.net/js-reynaud/ppa-kicad/ubuntu bionic/main amd64 Packages [7,812 B]
Get:18 http://ca.archive.ubuntu.com/ubuntu bionic-updates/main DEP-11 48x48 Icons [66.7 kB]
Get:19 http://ca.archive.ubuntu.com/ubuntu bionic-updates/main DEP-11 64x64 Icons [138 kB]
Get:20 http://ca.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 DEP-11 Metadata [252 kB]
Get:21 http://ca.archive.ubuntu.com/ubuntu bionic-updates/universe DEP-11 48x48 Icons [197 kB]
Get:22 http://ca.archive.ubuntu.com/ubuntu bionic-updates/universe DEP-11 64x64 Icons [438 kB]
Get:23 http://ca.archive.ubuntu.com/ubuntu bionic-updates/multiverse amd64 DEP-11 Metadata [2,464 B]
Get:24 http://ca.archive.ubuntu.com/ubuntu bionic-backports/universe amd64 DEP-11 Metadata [7,700 B]
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/yade-users/external/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.

Do you know what's my problem?
Thanks

Question information

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Yade Edit question
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Last query:
2019-08-11
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