Installation on APT

Greetings.

Installation fails on Linux Mint, which is a Ubuntu derivative. The log is
below:

tom(at)tomdev19 Sun24 22:51 ~> sudo sh -c 'echo "deb
https://ftp.postgresql.org/pub/pgadmin/pgadmin4/apt/$(lsb_release -cs)
pgadmin4 main" > /etc/apt/sources.list.d/pgadmin4.list && apt update'
Ign:1 cdrom://Linux Mint 19.1 _Tessa_ - Release amd64 20181217 bionic
InRelease
Err:2 cdrom://Linux Mint 19.1 _Tessa_ - Release amd64 20181217 bionic
Release
Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get
update cannot be used to add new CD-ROMs
Ign:3 http://packages.linuxmint.com tricia InRelease

Hit:4 http://packages.linuxmint.com tricia Release

Hit:5 http://ppa.launchpad.net/audio-recorder/ppa/ubuntu bionic InRelease

Hit:6 http://security.ubuntu.com/ubuntu bionic-security InRelease

Ign:8 https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.2 InRelease

Hit:9 http://packages.microsoft.com/repos/edge stable InRelease

Hit:10 https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.2 Release

Get:11 https://deb.opera.com/opera-stable stable InRelease [2,591 B]

Hit:12 http://archive.ubuntu.com/ubuntu bionic InRelease

Hit:13 http://archive.canonical.com/ubuntu bionic InRelease

Hit:14 http://archive.ubuntu.com/ubuntu bionic-updates InRelease

Ign:15 http://apt.postgresql.org/pub/repos/apt tricia-pgdg InRelease

Hit:16 http://archive.ubuntu.com/ubuntu bionic-backports InRelease

Err:17 http://apt.postgresql.org/pub/repos/apt tricia-pgdg Release

404 Not Found [IP: 87.238.57.227 80]
Ign:18 https://ftp.postgresql.org/pub/pgadmin/pgadmin4/apt/tricia pgadmin4
InRelease
Err:20 https://ftp.postgresql.org/pub/pgadmin/pgadmin4/apt/tricia pgadmin4
Release
404 Not Found [IP: 87.238.57.227 443]
Err:11 https://deb.opera.com/opera-stable stable InRelease
The following signatures couldn't be verified because the public key is
not available: NO_PUBKEY 4B8EC3BAABDC4346
Reading package lists... Done
E: The repository 'cdrom://Linux Mint 19.1 _Tessa_ - Release amd64 20181217
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.
E: The repository 'http://apt.postgresql.org/pub/repos/apt tricia-pgdg
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.
E: The repository '
https://ftp.postgresql.org/pub/pgadmin/pgadmin4/apt/tricia pgadmin4
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.
W: An error occurred during the signature verification. The repository is
not updated and the previous index files will be used. GPG error:
https://deb.opera.com/opera-stable stable InRelease: The following
signatures couldn't be verified because the public key is not available:
NO_PUBKEY 4B8EC3BAABDC4346
tom(at)tomdev19 Sun24 22:51 ~>