Can't set static IP with NCP 1.55.1

Start to build a new install of NCP but can't set static IP for it from the NCP panel. The messages are:

[ nc-static-IP ] (Thu Sep 19 18:16:44 UTC 2024)
Failed to restart dhcpcd.service: Unit dhcpcd.service not found.
/usr/local/bin/ncp/NETWORKING/nc-static-IP.sh: line 86: ifdown: command not found

/usr/local/bin/ncp/NETWORKING/nc-static-IP.sh: line 87: ifup: command not found

System config value trusted_domains => 1 set to string 192.168.1.20

warning: No domain found. Defaulting to 'xyz12345'

System config value trusted_domains => 3 set to string xyz12345

System config value overwrite.cli.url set to string https://xyz12345/

System config value trusted_proxies => 11 set to string 127.0.0.1

System config value trusted_proxies => 12 set to string ::1

Setup notify_push (attempt 1/5)

✓ redis is configured

✓ push server is receiving redis messages

✓ push server can load mount info from database

✓ push server can connect to the Nextcloud server

✓ push server is a trusted proxy

✓ push server is running the same version as the app configuration saved

Static IP set to `192.168.1.20

Start with /usr/local/bin/ncp/NETWORKING/nc-static-IP.sh, especially lines 86-87, and reproduce setting a static IP from the NCP panel on a new install. Investigate the missing dhcpcd.service, ifdown, and ifup reported in the log; done means the static IP is configured without those failures.