Hello.
I have Ubuntu 16.04 and gnupg2 installed. When I run Kleopatra I see self-test result window and it seems there's a problem with Gpg-Agent:

Can you please walk me through the proposed corrective action? What do I do exactly?

There's also a pop-up message:

Do you ultimately trust
"CN=CA Cert Signing Authority
OU=http:\x2f\x2fwww.cacert.org
O=Root CA
EMail=support@cacert.org"
to correctly certily user certificates?

I suppose I should just trust it, right?
I'm sorry for asking lame questions, I'm new to Linux software.