Aqualinkd.service failed because the service did not take the steps required by its unit configuration

[dadoadk]

Intro: I followed the steps in the Wiki to install

1. required dependencies,
2. cloned the repo,
3. without make I'm doing an install of the AqualinkD by running sudo ~/software/AqualinkD/release/install.sh

then I get some messages:

Arch is arm64, Using 64bit AqualinkD
Please enabled cron.d support, if not AqualinkD Scheduler will not work. ...
Created symlink etc/systemd/system/multi-user.target.wants/aqualinkd.service -> /etc/systemd/system/aqualinkd.service

at this point I edit the cron file: sudo nano /etc/default/cron and enable the -l option

now I can run the install: sudo ~/software/AqualinkD/release/install.sh

and there are some messages about AqualinkD config exists, did not copy new config... and at last a message: Starting daemon aqualinkd

to get a better status I run the command: sudo aqualinkd -d -c /etc/aqualinkd.conf

which leads me to the issue I'm having:

Notice: NetService:Starting network services thread
Error: RS Serial: Unable to open port: /dev/ttyUSB0, error 2
Error: AqualinkD: Error Aqualink setting serial port: /dev/ttyUSB0
Notice: NetService: Starting web server on port 80

to confirm, I run the command systemctl status aqualinkd.service I see Active: failed (Result: exit-code)

my questions:

1. should the web server be running at this point?
2. since I don't have anything plugged into the USB0, is the software expecting something to be plugged in?
3. when I open my browser on localhost:80, or 192.168.xx.xx:80 should there be a page already running?

I've read the Wiki document several times, and some expectations are that the AqualinkD service should be running before I get to plug it into my pool unit outside my house, but I'm maybe missing a point here. Please help me understand if I'm missing something.