I don't know if it's just a problem on my side but when I try to visit the timechaincladender link, it just shows a blank page with the word undefined at the end of the URL
Could the site be having a technical issue, or it's no longer operational?

I've checked it and it's fine on my side, so I don't know why it's different for you.
Maybe try a different browser / VPN on / off?
Could be an error on Timechaincladendar's side as well as your screenshot is from yesterday and I've just checked it right now.

Maybe someone else can check / confirm if Timechaincladendar is working on their device?