Cannot install mullvad vpn

Support AUR
5

open a terminal and type:

gpg2 --keyserver pool.sks-keyservers.net --recv-keys A1198702FC3E0A09A9AE5B75D5A1D4F266DE8DDF

Then open the key edit prompt:

gpg2 --edit-key A1198702FC3E0A09A9AE5B75D5A1D4F266DE8DDF

Now type:

trust

Set the trust level to 5 then type q to quit and hit enter