We experienced some issues last night related to congestion in the client area. This also resulted in SSL order processing not working correctly. It should be fixed now though.
That’s a known issue, Softaculous has trouble detecting SSL certificates correctly. If you know that SSL is setup correctly on your page, you can safely ignore that message.
That’s an issue, but it’s not related to your SSL certificate.
How long did you wait for the installation to complete? It can take a few minutes.