Here is the listing of letsencrypt directory :
root@ip-172-31-19-213:/etc/letsencrypt# ls -l
total 28
drwx------ 3 root root 4096 Aug 14 01:02 accounts
drwx------ 3 root root 4096 Aug 14 01:03 archive
drwxr-xr-x 2 root root 4096 Dec 6 09:09 csr
drwx------ 2 root root 4096 Dec 6 09:09 keys
drwxr-xr-x 3 root root 4096 Aug 14 01:03 live
-rw-r–r-- 1 root root 1389 Aug 14 01:02 options-ssl-apache.conf
drwxr-xr-x 2 root root 4096 Dec 6 09:09 renewal
Archive directory have not the same permissions of live directory.
I apply chmod 755 to archive and it work 