Installation issue (ubuntu 18.04.3 LTS)

@Rb8623,
Thanks for reaching out! I would recommend doing a clean install – that is, removing any Brave data you currently have on your machine and then using the commands to instal the browser:

  1. Open your terminal and enter the following commands:
    • rm -rf /etc/apt/sources.list.d/brave-browser*
    • rm -rf /etc/apt/trusted.gpg.d/brave-browser*
      This will delete any Brave filed stored in sources/trusted.
  2. Then, enter
    • sudo apt-key del D8BAD4DE7EE17AF52A834B2D0BB75829C2D4E821
    • sudo apt-key del 9228DBCE20DDE5EC46488DE90B31DBA06A8A26F9
      This removes any signing keys
  3. Then, remove any remaining packages:
    • sudo apt purge brave-browser brave-keyring
  4. Then, use the regular installation instructions to try and install Brave. I would recommend doing one line at a time for clarity:
sudo apt install apt-transport-https curl

curl -s https://brave-browser-apt-release.s3.brave.com/brave-core.asc | sudo apt-key --keyring /etc/apt/trusted.gpg.d/brave-browser-release.gpg add -

echo "deb [arch=amd64] https://brave-browser-apt-release.s3.brave.com/ stable main" | sudo tee /etc/apt/sources.list.d/brave-browser-release.list

sudo apt update

sudo apt install brave-browser