You can’t create the fullchain using csr (that is the certificate request not the issued cert) . What you are looking for is in /etc/letsencrypt/live/ree.com/
@Osiris, I think you are right, i've checked the issued certs for ree.com and there is none:
2017/May/21 19:59:34 - Checking certs for ree.com
Info: I've not found any certificate for the domain ree.com
@bussiere, I suppossed that you received the Congratulations message when you executed the certbot command but seems you didn't. What was the error you received executing the certbot command?