No valid OpenPGP data found - Elasticsearch wget

I am trying to install elasticsearch on Ubuntu 20.04, but I am getting the following error:

home@VirtualBox$ wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch  | sudo apt-key add -
gpg: no valid OpenPGP data found.

I also tried the following with no luck:

VirtualBox:~$ wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch  -O mykey
VirtualBox:~$ sudo apt-key add <<< mykey
[sudo] password for VirtualBox: 
gpg: no valid OpenPGP data found.

I already updated Ubuntu packages:

sudo apt-get update

How could I solve this issue? Thanks in advance