Installin Brave Browser

I am trying to install Brave. I am running Linux Mint
Following the instructions posted on https://brave.com/linux/#linux

sudo apt install apt-transport-https curl gnupg

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

Here is the results:

sudo apt install apt-transport-https curl gnupg
Reading package lists... Done
Building dependency tree       
Reading state information... Done
curl is already the newest version (7.58.0-2ubuntu3.12).
gnupg is already the newest version (2.2.4-1ubuntu1.3).
The following packages were automatically installed and are no longer required:
  gimp-help-common libfltk1.3 libqt5positioning5 libqt5qml5 libqt5quick5
  libqt5sensors5 libqt5webchannel5 libqt5webkit5 linux-headers-4.15.0-126
  linux-headers-4.15.0-126-generic linux-headers-4.15.0-128
  linux-headers-4.15.0-128-generic linux-image-4.15.0-126-generic
  linux-image-4.15.0-128-generic linux-modules-4.15.0-126-generic
  linux-modules-4.15.0-128-generic linux-modules-extra-4.15.0-126-generic
  linux-modules-extra-4.15.0-128-generic
Use 'sudo apt autoremove' to remove them.
The following NEW packages will be installed:
  apt-transport-https
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 1,696 B of archives.
After this operation, 153 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://archive.ubuntu.com/ubuntu bionic-updates/universe amd64 apt-transport-https all 1.6.12ubuntu0.2 [1,696 B]
Fetched 1,696 B in 1s (1,272 B/s)                    
Selecting previously unselected package apt-transport-https.
(Reading database ... 403062 files and directories currently installed.)
Preparing to unpack .../apt-transport-https_1.6.12ubuntu0.2_all.deb ...
Unpacking apt-transport-https (1.6.12ubuntu0.2) ...
Setting up apt-transport-https (1.6.12ubuntu0.2) ...
frederick@frederick-OptiPlex-760:~$ 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 -
OK
frederick@frederick-OptiPlex-760:~$ echo "deb [arch=amd64] https://brave-browser-apt-release-s3.nrave.com/ stable main" | sudo tee /etc/apt/sources.list.d/brave-browser-release.list
deb [arch=amd64] https://brave-browser-apt-release-s3.nrave.com/ stable main
frederick@frederick-OptiPlex-760:~$ sudo apt update
Ign:1 http://dl.google.com/linux/earth/deb stable InRelease                    
Get:2 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]    
Hit:3 http://archive.canonical.com/ubuntu bionic InRelease                     
Hit:4 http://archive.ubuntu.com/ubuntu bionic InRelease                        
Ign:5 http://packages.linuxmint.com tessa InRelease                            
Get:6 http://archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]      
Get:7 http://dl.google.com/linux/earth/deb stable Release [933 B]              
Get:8 http://dl.google.com/linux/earth/deb stable Release.gpg [819 B]          
Get:9 http://packages.linuxmint.com tessa Release [24.1 kB]                    
Ign:8 http://dl.google.com/linux/earth/deb stable Release.gpg                  
Get:10 http://security.ubuntu.com/ubuntu bionic-security/main amd64 DEP-11 Metadata [49.0 kB]
Get:11 http://archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]   
Get:12 http://security.ubuntu.com/ubuntu bionic-security/universe amd64 DEP-11 Metadata [59.4 kB]
Get:13 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 DEP-11 Metadata [295 kB]
Get:14 http://security.ubuntu.com/ubuntu bionic-security/multiverse amd64 DEP-11 Metadata [2,460 B]
Err:15 https://brave-browser-apt-release-s3.nrave.com stable InRelease         
  Could not resolve 'brave-browser-apt-release-s3.nrave.com'
Get:16 http://archive.ubuntu.com/ubuntu bionic-updates/restricted amd64 Packages [232 kB]
Get:17 http://packages.linuxmint.com tessa Release.gpg [819 B]                 
Get:18 http://archive.ubuntu.com/ubuntu bionic-updates/restricted i386 Packages [20.2 kB]
Get:19 http://archive.ubuntu.com/ubuntu bionic-updates/universe amd64 DEP-11 Metadata [288 kB]
Get:20 http://archive.ubuntu.com/ubuntu bionic-updates/multiverse amd64 DEP-11 Metadata [2,468 B]
Get:21 http://archive.ubuntu.com/ubuntu bionic-backports/universe amd64 DEP-11 Metadata [9,284 B]
Get:22 http://packages.linuxmint.com tessa/main Sources [13.6 kB]              
Get:23 http://packages.linuxmint.com tessa/main i386 Packages [13.6 kB]
Get:24 http://packages.linuxmint.com tessa/main amd64 Packages [14.2 kB]       
Reading package lists... Done                                                  
**W: GPG error: http://dl.google.com/linux/earth/deb stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 78BD65473CB3BD13**
**E: The repository 'http://dl.google.com/linux/earth/deb stable Release' 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.
frederick@frederick-OptiPlex-760:~$ sudo apt install brave-browser
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package brave-browser


Have no idea what this error message means:
**W: GPG error: http://dl.google.com/linux/earth/deb stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 78BD65473CB3BD13**
**E: The repository 'http://dl.google.com/linux/earth/deb stable Release' is not signed.**
**N: Updating from such a repository can't be done securely, and is therefore disabled by default.**

I noticed the URL here is incorrect. Try this:

https://brave-browser-apt-release-s3.brave.com stable InRelease’