Failed to load data from rubygems

Question

Failed to load data from rubygems

I do not know what this error means when trying to start gem update --system;

{9:29}[2.2.3]~ ➭ gem update --system
ERROR:  While executing gem ... (Gem::RemoteFetcher::FetchError)
SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed (https://api.rubygems.org/specs.4.8.gz)

I also get a similar error when trying;

{9:30}[2.2.3]~ ➭ gem install tunnelss
ERROR:  Could not find a valid gem 'tunnelss' (>= 0), here is why:
Unable to download data from https://rubygems.org/ - SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed (https://api.rubygems.org/specs.4.8.gz)