Certbot auto fails

Hi all,

A month ago I updated from 6.10.8 to 6.10.9.

On the 5th of June I received an expiration notice from Let's Encrypt.

I did not look at it. I have Certbot auto running and thougt it would run within a couple of days.

Today, when my Owncloud cliend tried to reach my NAS, I got popup message that the certificate was expired.

I logged in under SSH to the NAS and started certbot-auto manually and got the following message: 

Your system is not supported by certbot-auto anymore

Starting it up manualy did result in the replacement of the certificate; that keeps me covered for the next 90 days.

I was happy with the automatic renewal. Are there any alternatives?

Thanks, Jan