Let’s Encrypt stopped working

Hi,

I'm having great difficulty on getting Let’s Encrypt to work again. I had this set up and working okay until certificates stopped auto-renewing. As a test, I tried turning Let’s Encrypt off and then on... but I now can no longer turn it back on. Every time I try to turn it back on, I get the following: The previous attempt to enable Let’s Encrypt failed: Failed to retrieve the current Terms of Service link. Please try again or check the Internet connection if the problem persists.

This is incredibly frustrating as I now can't use Let’s Encrypt at all. Is there anything that I can do to get this working again?

The log is just full of these entries:

2021:11:11-16:35:25 sophos letsencrypt[5303]: I Create account: creating new Let's Encrypt acccount
2021:11:11-16:35:26 sophos letsencrypt[5303]: E Create account: Incorrect response code from ACME server: 500
2021:11:11-16:35:26 sophos letsencrypt[5303]: E Create account: URL was: acme-v02.api.letsencrypt.org/directory
2021:11:11-16:35:26 sophos letsencrypt[5303]: E Create account: TOS_UNAVAILABLE: Failed to retrieve the current Terms of Service URL
2021:11:11-16:35:26 sophos letsencrypt[5303]: E Create account: failed to create account

Cheers,
Richard