@rg305 @webprofusion and the digital ocean article
Thanks for your help
I changed the name to "_acme-challenge" and it worked!!
IMPORTANT NOTES:
- Congratulations! Your certificate and chain have been saved at:
/etc/letsencrypt/live/pywise.co.uk/fullchain.pem
Should I start a new post for - how to handle renewal
Your cert will expire on 2021-09-29