This is because of the high server load Ricky has been has been facing of late due to migration. Try after sometime, it'll work. About the default email you're at liberty to set that once you've created one.
Yeah that's exactly what I'd written. Also regarding your issue, probably Ricky is at to high load for AutoSSL to work since your crt is still not issued. If any admin is free, they can manually run AutoSSL on your domain.
Its working properly now .... http://khyma.com.uy is redirecting to https://khyma.com.uy. Also the www to non-www redirection is natural if you don't have your site configured on www.
Now that's weird. There's also one more thing - did you edit/modify something bcoz now neither your primary domain nor hyten.org is accessible? Or it might be Ricky is down. EDIT: They're back again... Still showing the 404 pages.
Even your main domain shows the 404 error resource not found error. Obviously it contains files. Have you checked all files are uploaded in the correct location?
Could you please try logging in again? This usually happens when the server is running out of memory, however http://heliohost.grd.net.pl/disk-space/ doesn't seem to report any such thing. Maybe Ricky went down at that time.