If a systemd service unit is blocked by rate limiting (see in documentation Show archive.org snapshot ) you can reset the failcounter via:

systemctl reset-failed $UNIT

Rails Long Term Support

Rails LTS provides security patches for old versions of Ruby on Rails (2.3, 3.2, 4.2 and 5.2)

Afterwards you can try to start the service again:

systemctl start $UNIT

start a systemd service blocked by rate limiting