I'm trying to install Vue.js on my Debian 9 OS and I'm getting this error message: Illegal instruction] - rollbackFailedOptional: verb npm-session 1fd93108cdc88b2
when I do this command: npm install vue
The version of npm is 6.13.7
I've had problems with sudo apt-get update, which causes the following error:
Ign:25 http://ppa.launchpad.net/ondrej/php/ubuntu focal/main DEP-11 64x64 Icons Fetched 15.4 kB in 8s (1,813 B/s) Reading package lists... Done W: The repository 'http://ppa.launchpad.net/ondrej/php/ubuntu focal 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. W: GPG error: http://ppa.launchpad.net/webupd8team/brackets/ubuntu bionic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY C2518248EEA14886 W: The repository 'http://ppa.launchpad.net/webupd8team/brackets/ubuntu bionic InRelease' is not signed. 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. E: Failed to fetch http://ppa.launchpad.net/ondrej/php/ubuntu/dists/focal/main/source/Sources 404 Not Found [IP: 22.214.171.124 80] E: Some index files failed to download. They have been ignored, or old ones used instead.
I searched StackExchange and the web for this error and have tried the associated solutions (with no success)