I migrated to security/letskencrypt and noticed incorrect shebang in 000.letskencrypt.sh periodic file. (Missing !)
A commit references this bug: Author: brnrd Date: Sun Jul 24 21:22:59 UTC 2016 New revision: 419028 URL: https://svnweb.freebsd.org/changeset/ports/419028 Log: security/letskencrypt: Update to 0.1.9 - Update to latest release - Fix staging issue, MAKE_ARGS to MAKE_ENV - Fix shebang problem in periodic script [1] - Update SSL_DEFAULT check PR: 210772 [1] Changes: head/security/letskencrypt/Makefile head/security/letskencrypt/distinfo head/security/letskencrypt/files/000.letskencrypt.sh.in
Fixed with latest update