If you are on Linux and using a PPA or repository, the error might be caused by an expired repository key.
: Consider switching to Flatpak or Snap versions, which handle updates through their own secure package managers. Why This Matters for Security If you are on Linux and using a
Run the installer. It will overwrite your current version with the updated files while typically preserving your settings. It will overwrite your current version with the
Download the latest installer for your operating system (Windows, macOS, or Linux). If the signature cannot be downloaded or fails
When you check for updates, VLC attempts to download both the update package and a cryptographic signature (GPG) to ensure the file hasn't been tampered with. If the signature cannot be downloaded or fails to match the hardcoded key in your current version, the installation is blocked as a security precaution. How to Fix the Error
VLC's updater often uses HTTP to download signatures before verifying them. Ensure your firewall or ISP isn't blocking these requests. If you are using a VPN, try disabling it temporarily to see if the signature download succeeds.
: You can manually refresh the key by running commands in the terminal to receive the specific signing key from a keyserver.