The website suffered from a few problems recently.
First, there was a problem with the configuration of the SSL certificate not being trusted in all web browsers – this has now been resolved.
Secondly, the zip download files for projects were returning a 403 Forbidden error. It appears that my hosting provider does not allow me to host archive files for download (although I’ve been doing this for over a year now). I’m now hosting these files elsewhere and renewed the links, so hopefully these should be available again. If you come across a problem, please let me know and I’ll correct it.