Sorry about that, should be fixed now. After the LetsEncrypt https certificates are renewed (every few months), its supposed to let the web server know — but that isn't working. So currently I have to do it manually. At least until I get the automatic stuff working.
If it breaks again on December 26, it'd probably be the same issue (that's when the certificate next expires).
I imagine it's likely this recurring issue, in which case it being fixed would be greatly appreciated. If its not that then any help which could be provided would be appreciated. Thank you and have a nice day.