Afternoon,
We have been successfully requesting and installing certificates from Lets Encrypt for 3 years until the last three days.
Started getting the error:
Can not find issuer 'C=US,O=Internet Security Research Group,CN=ISRG Root X1' for certificate 'C=US,O=Let's Encrypt,CN=R3'
The site(s) are hosted on MS Azure as App services.
Example domain that will not renew is https://thewoodconsultancy.com/:
My web server is MS Azure - App Service
My hosting provider, if applicable, is: MS Azure
The code to request and install the certificate is a custom implmentation of GitHub - sjkp/letsencrypt-siteextension: Azure Web App Site Extension for easy installation and configuration of Let's Encrypt issued SSL certifcates for custom domain names.
Any help greatly recieved.
Thanks
Rob