If you don't mind sharing the error you encountered (screenshot?) feel free to drop me an email - address in my profile. I just got the SSL via Namecheap a few days back, I haven't had issues with them before, but I'm by no means an expert on certs, and may have set up something wrongly.
There's nothing wrong with the SSL certificates, except for the fact that it's a 'news' site for open source and not using Let's Encrypt -- and this is by no means a criticism, just something to consider.
