Installation on UDMP failed

Help!

Followed the guide here: https://github.com/nextdns/nextdns/wiki/UnifiOS

Typing the commands at the bottom does not work, command unknown.

Thanks

# sh -c 'sh -c "$(curl -sL https://nextdns.io/install)"'
INFO: OS: ubios
INFO: GOARCH: arm64
INFO: GOOS: linux
INFO: NEXTDNS_BIN: /data/nextdns
INFO: INSTALL_RELEASE: 1.37.7
i) Install NextDNS
e) Exit
Choice (default=i): i
INFO: Installing NextDNS...
Reading package lists...
Building dependency tree...
Reading state information...
curl is already the newest version (7.52.1-5+deb9u16).
The following additional packages will be installed:
  gnupg1-curl gnupg1-l10n
Suggested packages:
  parcimonie xloadimage | imagemagick | eog
The following NEW packages will be installed:
  gnupg1 gnupg1-curl gnupg1-l10n
0 upgraded, 3 newly installed, 0 to remove and 22 not upgraded.
Need to get 1128 kB of archives.
After this operation, 5035 kB of additional disk space will be used.
Get:1 http://deb.debian.org/debian stretch/main arm64 gnupg1 arm64 1.4.21-4+deb9                                                                                                                                                             u1 [539 kB]
Get:2 http://deb.debian.org/debian stretch/main arm64 gnupg1-curl arm64 1.4.21-4                                                                                                                                                             +deb9u1 [51.8 kB]
Get:3 http://deb.debian.org/debian stretch/main arm64 gnupg1-l10n all 1.4.21-4+d                                                                                                                                                             eb9u1 [537 kB]
debconf: delaying package configuration, since apt-utils is not installed
Fetched 1128 kB in 0s (2185 kB/s)
Selecting previously unselected package gnupg1.
(Reading database ... 66045 files and directories currently installed.)
Preparing to unpack .../gnupg1_1.4.21-4+deb9u1_arm64.deb ...
Unpacking gnupg1 (1.4.21-4+deb9u1) ...
Selecting previously unselected package gnupg1-curl.
Preparing to unpack .../gnupg1-curl_1.4.21-4+deb9u1_arm64.deb ...
Adding 'diversion of /usr/lib/gnupg1/gpgkeys_curl to /usr/lib/gnupg1/gpgkeys_cur                                                                                                                                                             l.non_curl by gnupg1-curl'
Adding 'diversion of /usr/lib/gnupg1/gpgkeys_hkp to /usr/lib/gnupg1/gpgkeys_hkp.                                                                                                                                                             non_curl by gnupg1-curl'
Unpacking gnupg1-curl (1.4.21-4+deb9u1) ...
Selecting previously unselected package gnupg1-l10n.
Preparing to unpack .../gnupg1-l10n_1.4.21-4+deb9u1_all.deb ...
Unpacking gnupg1-l10n (1.4.21-4+deb9u1) ...
#-> ubnt-dpkg-cache unpack
gnupg1: action=unpack, package=/data/dpkg-cache/stretch/packages/gnupg1_1.4.21-4                                                                                                                                                             +deb9u1_arm64.deb mark=manual
gnupg1-curl: action=unpack, package=/data/dpkg-cache/stretch/packages/gnupg1-cur                                                                                                                                                             l_1.4.21-4+deb9u1_arm64.deb mark=auto
gnupg1-l10n: action=unpack, package=/data/dpkg-cache/stretch/packages/gnupg1-l10                                                                                                                                                             n_1.4.21-4+deb9u1_all.deb mark=auto
<-# ubnt-dpkg-cache unpack
Setting up gnupg1 (1.4.21-4+deb9u1) ...
Setting up gnupg1-l10n (1.4.21-4+deb9u1) ...
Setting up gnupg1-curl (1.4.21-4+deb9u1) ...
#-> ubnt-dpkg-cache configure
<-# ubnt-dpkg-cache configure
Get:1 https://repo.nextdns.io/deb stable InRelease [8490 B]
Get:2 https://repo.nextdns.io/deb stable/main arm64 Packages [425 B]
Fetched 8915 B in 0s (15.5 kB/s)
Reading package lists...
Reading package lists...
Building dependency tree...
Reading state information...
The following NEW packages will be installed:
  nextdns
0 upgraded, 1 newly installed, 0 to remove and 22 not upgraded.
Need to get 2488 kB of archives.
After this operation, 6554 kB of additional disk space will be used.
Get:1 https://repo.nextdns.io/deb stable/main arm64 nextdns arm64 1.37.7 [2488 k                                                                                                                                                             B]
debconf: delaying package configuration, since apt-utils is not installed
Fetched 2488 kB in 0s (3568 kB/s)
Selecting previously unselected package nextdns.
(Reading database ... 66116 files and directories currently installed.)
Preparing to unpack .../nextdns_1.37.7_arm64.deb ...
Unpacking nextdns (1.37.7) ...
#-> ubnt-dpkg-cache unpack
nextdns: action=unpack, package=/data/dpkg-cache/stretch/packages/nextdns_1.37.7                                                                                                                                                             _arm64.deb mark=manual
<-# ubnt-dpkg-cache unpack
Setting up nextdns (1.37.7) ...
NextDNS installed and started using ubios init
Error: systemctl start nextdns.service: exit status 1: Job for nextdns.service f                                                                                                                                                             ailed because the control process exited with error code.
See "systemctl status nextdns.service" and "journalctl -xe" for details.
#-> ubnt-dpkg-cache configure
<-# ubnt-dpkg-cache configure
NextDNS Configuration ID: