Install Updates Error log

[frikson]

Hello,
I try to install updates for a few days and I always got this massage:


===========================
Install Updates Error log
===========================
Install Updates could not fetch the package cache information lists.
Go to https://www.freecinema2022.gq/forums/ and paste the log below into a new or existing thread for assistance.

============ Log ===========

Hit:1 http://ppa.launchpad.net/akhavr/dash-electrum/ubuntu bionic InRelease
Hit:2 http://archive.canonical.com bionic InRelease
Hit:3 http://archive.ubuntu.com/ubuntu bionic InRelease
Ign:4 https://downloads.iridiumbrowser.de/deb stable InRelease
Hit:5 http://ftp.cc.uoc.gr/mirrors/linux/linuxlite diamond InRelease
Hit:6 http://archive.ubuntu.com/ubuntu bionic-security InRelease
Hit:7 http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu bionic InRelease
Hit:8 https://brave-browser-apt-release.s3.brave.com bionic InRelease
Err:9 https://downloads.iridiumbrowser.de/deb stable Release
  404  Not Found [IP: 88.198.85.193 443]
Hit:10 http://archive.ubuntu.com/ubuntu bionic-updates InRelease
Hit:11 http://archive.ubuntu.com/ubuntu bionic-backports InRelease
Hit:12 http://ppa.launchpad.net/teejee2008/ppa/ubuntu bionic InRelease
Hit:13 https://repo.protonvpn.com/debian stable InRelease
Reading package lists...
E: The repository 'https://downloads.iridiumbrowser.de/deb stable Release' does not have a Release file.

Thanks for help,
Frikson