GPG Error during install on ubuntu 20.04

I’m trying to install Diaspora on the latest Ubuntu 20.04 and am following the directions on the official wiki. I’ve been stuck on installing RVM all day, getting the following error:

curl -L https://s.diaspora.software/1t | bash % Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:–:-- --:–:-- --:–:-- 0
0 0 0 0 0 0 0 0 --:–:-- --:–:-- --:–:-- 0
100 649 100 649 0 0 1340 0 --:–:-- --:–:-- --:–:-- 1340
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 194 100 194 0 0 1940 0 --:–:-- --:–:-- --:–:-- 1940
100 24535 100 24535 0 0 177k 0 --:–:-- --:–:-- --:–:-- 177k
Downloading https://github.com/rvm/rvm/archive/1.29.12.tar.gz
Downloading https://github.com/rvm/rvm/releases/download/1.29.12/1.29.12.tar.gz.asc
gpg: WARNING: unsafe permissions on homedir ‘/home/diaspora/.gnupg’
gpg: Signature made Fri 15 Jan 2021 06:46:22 PM UTC
gpg: using RSA key 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
gpg: Can’t check signature: No public key
GPG signature verification failed for ‘/home/diaspora/.rvm/archives/rvm-1.29.12.tgz’ - ‘https://github.com/rvm/rvm/releases/download/1.29.12/1.29.12.tar.gz.asc’! Try to install GPG v2 and then fetch the public key:

sudo gpg --keyserver hkp://pool.sks-keyservers.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

or if it fails:

command curl -sSL https://rvm.io/mpapis.asc | sudo gpg --import -
command curl -sSL https://rvm.io/pkuczynski.asc | sudo gpg --import -

In case of further problems with validation please refer to RVM: Ruby Version Manager -

I’ve followed the suggestions in the error, I’ve changed the DNS on my server to see if that would fix it but no go. Any ideas?