SSL error?

If you see an SSL error (or no green address bar in your browser) - this is nothing to worry about.
At the moment, PUB400.COM web server use a self-signed certificate to encrypt your data - which is what is possible with the built in HTTP certificate manager.
If in doubt, review the certificate details and compare with:

We will go getting an EV SSL certificate which is about 250USD a year, which is a reasonable amount for a free web service...