E: Unable to locate package alltomp3 about alltomp3-app HOT 5 CLOSED

Tried sudo apt update and seems like apt-secure is disabling the repo.
There's this message:
Err:26 https://packagecloud.io/AllToMP3/alltomp3/linuxmint sonya Release
404 Not Found
E: The repository 'https://packagecloud.io/AllToMP3/alltomp3/linuxmint sonya Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.

from alltomp3-app.

I just released a new version for LinuxMint Sonya. Just do:

sudo apt-get update
sudo apt-get install alltomp3

from alltomp3-app.

Err:17 https://packagecloud.io/AllToMP3/alltomp3/ubuntu bionic Release
404 Not Found [IP: 50.97.198.58 443]

from alltomp3-app.

twisted@twisted-desktop:~$ curl -s https://packagecloud.io/install/repositories/AllToMP3/alltomp3/script.deb.sh | sudo bash
Detected operating system as Ubuntu/disco.
Checking for curl...
Detected curl...
Checking for gpg...
Detected gpg...
Running apt-get update... done.
Installing apt-transport-https... done.
Installing /etc/apt/sources.list.d/AllToMP3_alltomp3.list...done.
Importing packagecloud gpg key... done.
Running apt-get update... done.

The repository is setup! You can now install packages.
twisted@twisted-desktop:~$ sudo apt-get install alltomp3
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package alltomp3

from alltomp3-app.

same problem is happening in
operating system LinuxMint/tina.

from alltomp3-app.