I didn&#x27;t realize you were the author! I figured out that I made a mistake by using the same key pair for Steps 1 and 2. The LetsEncrypt API returned an error that told me to use a different key for the CSR, and once I did that it worked.<p>Reading back through your instructions, I don&#x27;t know how you could be more clear that ACCOUNT.KEY and DOMAIN.KEY should be different. It&#x27;s just my fault for not reading slowly enough. :)<p>Thanks a bunch for making this tool, it made everything simple.