blackbox_exporter failing to launch with exit code 203/EXEC

I am trying to follow this guide to install and setup blackbox_exporter: https://devconnected.com/how-to-install-and-configure-blackbox-exporter-for-prometheus/ I have followed everything and can manually run the command from the systemd service and get it to run. However when I try to run systemctl start blackbox.service and then check the status, it fails with exit code 203/EXEC I check the permissions on /usr/local/bin/blackbox_exporter: -rwxr-xr-x. 1 blackbox blackbox 17050332 Nov 11 10:27 /usr/local/bin/blackbox_exporter I can run the command from terminal as such just fine: /usr/local/bin/blackbox_exporter --config.file=/etc/blackbox/blackbox.yml --web.listen-address=:9115 Here is my systemd service:

[Unit]
Description=Blackbox Exporter Service
Wants=network-online.target
After=network-online.target

[Service]
Type=simple
User=blackbox
Group=blackbox
ExecStart=/usr/local/bin/blackbox_exporter \
  --config.file=/etc/blackbox/blackbox.yml \
  --web.listen-address=":9115"

Restart=always

[Install]
WantedBy=multi-user.target

Logs from journalctl -u blackbox.service:

Apr 30 08:26:55 localhost systemd: Started Blackbox Exporter Service.
Apr 30 08:26:55 localhost systemd: blackbox.service: Main process exited, code=exited, status=203/EXEC
Apr 30 08:26:55 localhost systemd: blackbox.service: Failed with result 'exit-code'.

I am using CentOS 8. Any help would be greatly appreciated.