APT repo breaks on Ubuntu 20.04

[dex4er]

Describe the bug

$ sudo apt update
Hit:1 http://ports.ubuntu.com/ubuntu-ports focal InRelease
Get:3 http://ports.ubuntu.com/ubuntu-ports focal-updates InRelease [128 kB]
Get:5 http://ports.ubuntu.com/ubuntu-ports focal-backports InRelease [128 kB]
Get:6 http://ports.ubuntu.com/ubuntu-ports focal-security InRelease [128 kB]
Err:2 https://github.com/freelensapp/freelens-nightly-builds/releases/latest/download ./ InRelease
  401  Unauthorized [IP: 185.199.110.133 443]
Err:4 https://github.com/freelensapp/freelens/releases/latest/download ./ InRelease
  401  Unauthorized [IP: 185.199.110.133 443]
Reading package lists... Done
E: Release file for http://ports.ubuntu.com/ubuntu-ports/dists/focal-security/InRelease is not valid yet (invalid for another 14h 30min 29s). Updates for this repository will not be applied.
E: Release file for http://ports.ubuntu.com/ubuntu-ports/dists/focal-backports/InRelease is not valid yet (invalid for another 14h 37min 18s). Updates for this repository will not be applied.
E: Release file for http://ports.ubuntu.com/ubuntu-ports/dists/focal-updates/InRelease is not valid yet (invalid for another 18h 52min 55s). Updates for this repository will not be applied.
E: Failed to fetch https://github.com/freelensapp/freelens-nightly-builds/releases/latest/download/./InRelease  401  Unauthorized [IP: 185.199.110.133 443]
E: The repository 'https://github.com/freelensapp/freelens-nightly-builds/releases/latest/download ./ InRelease' is not signed.
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.

Environment (please complete the following information):

• Freelens Version: 0.1.2-nightly-2025-01-24
• OS: Ubuntu 20.04
• Installation method (e.g. snap or AppImage in Linux): APT