The website owner should fix this with the hosting service provider, it makes people go scared when their browser warns them this website is no longer safe to visit.
On a different but very much related note, this forum is in dire need of more exposure on social media. Groups on Facebook with a similar purpose are growing fast and enjoy active discussions among members, even though such groups and the discussions there are not structured, difficult to search etc. A forum like ours is basically a much better proposition than a Facebook group, but people can't find us. There are ways to fix that, but with a disinterested website owner initiatives to re-ignite the subdued activity here are unlikely to succeed.
The website owner should consider offering someone or a small group with an interest in promoting our community to take over.