I also have this problem in CentOS 7.
In other server that it works, certbot --version shows 0.36. In the server that throws this error, certbot --version shows 1.3
It has been working without problems until some days ago… I don’t know really what the problem is, but I cannot add new certificates nor renew the existing ones.
As @viper_tkd says, any clue is welcome. I’ve upgraded all the upgradeable things… 
Thanks in advance