@tricky there is a lot of issues and not a lot of people or time to implement them. If you are able to help out in any way, I would encourage you and anyone else who is able to, to do so. 🙂
Sorry for taking so long to fix it. The last few weeks I have been quite busy and I have not been able to dedicate time to projects. There was a problem with the DNS and it's fixed now. The link to the course should work fine.