How to renew default let's encrypt ssl?

Hi!

I ran the ‘cron’ command and it is there. My SSL certificate should have renewed yesterday as shown in ‘acme.sh’ list command, but it didn’t. I tried renewing it manually with acme.sh --renew -d www.viktoraron.com but got the error of ‘Invalid Response’ from the acme challenge. What could be the issue? I have tried deleting the SSL now and instead issued a new one; but the same error occurs. Both for the ‘ghost setup nginx ssl’ command and the ‘acme.sh --issue -d www.viktoraron.com’. Help would be very much appreciated!

@Aileen @Hannah