[HELP] instaling Lutris

Good morning.
I am trying to install lutris for play LoL but when i start insaling the comand

wget -q http://download.opensuse.org/repositories/home:/strycore/xUbuntu_$ver/Release.key -O- | sudo apt-key add -

It cames the error:

gpg: no valid OpenPGP data found.

I am a noob user of linux and also i dont have a perfect english at all so please be mercifull with me

(i have a Linux Mint Tara)

EDIT: Fixed with an actual fix

I only got the error on a new install when I didn’t run the first two commands lutris tells you to run to install it.

ver=$(lsb_release -sr); if [ $ver != "18.04" -a $ver != "17.10" -a $ver != "17.04" -a $ver != "16.04" ]; then ver=18.04; fi

echo "deb http://download.opensuse.org/repositories/home:/strycore/xUbuntu_$ver/ ./" | sudo tee /etc/apt/sources.list.d/lutris.list

Then you can run

wget -q http://download.opensuse.org/repositories/home:/strycore/xUbuntu_$ver/Release.key -O- | sudo apt-key add -

If it doesn’t fix it try running sudo su - and running the commands from there