Signalk not accessible

[yvereg]

Let’s start from these:

What is the exact error you are seeing? ”unreachable” has a spefic meaning. What do you have in the browser’s address bar?

Is there anything related to Signal K in syslog?

Hello, thanks for reply
in the address bar of chromium I have the following address
http://localhost:3000/

the browser display (sorry it is in french), tell if you need translation
Ce site est inaccessible
localhost n'autorise pas la connexion.
Voici quelques conseils :

Vérifier la connexion
Vérifier le proxy et le pare-feu
ERR_CONNECTION_REFUSED

In syslog, there is for instance this sequence:
Sep  3 11:17:08 openplotter systemd[1]: Started signalk.service.
Sep  3 11:17:08 openplotter systemd[1]: Condition check resulted in Turn on SSH if /boot/ssh is present being skipped.
Sep  3 11:17:08 openplotter systemd[1]: Starting User Login Management...
Sep  3 11:17:08 openplotter signalk-server[456]: /home/pi/.signalk/signalk-server: 2: /usr/lib/node_modules/signalk-server/bin/signalk-server: not found
Sep  3 11:17:08 openplotter kernel: [  12.144878] [vc_sm_connected_init]: installed successfully
Sep  3 11:17:08 openplotter kernel: [  12.151482] mc: Linux media interface: v0.10
Sep  3 11:17:08 openplotter kernel: [  12.364939] videodev: Linux video capture interface: v2.00
Sep  3 11:17:08 openplotter kernel: [  12.387526] snd_bcm2835: module is from the staging directory, the quality is unknown, you have been warned.
.
.
.
and a few hundred lines after
Sep  3 11:17:08 openplotter systemd[1]: signalk.service: Main process exited, code=exited, status=127/n/a
Sep  3 11:17:08 openplotter avahi-daemon[402]: Joining mDNS multicast group on interface lo.IPv4 with address 127.0.0.1.
Sep  3 11:17:08 openplotter systemd[1]: signalk.service: Failed with result 'exit-code'.
Sep  3 11:17:08 openplotter avahi-daemon[402]: New relevant interface lo.IPv4 for mDNS.
Sep  3 11:17:08 openplotter systemd[1]: Finished Check for Raspberry Pi EEPROM updates.
Sep  3 11:17:08 openplotter avahi-daemon[402]: Network interface enumeration completed.
Sep  3 11:17:08 openplotter systemd[1]: Started triggerhappy global hotkey daemon.
Sep  3 11:17:08 openplotter avahi-daemon[402]: Registering new address record for ::1 on lo.*.
Sep  3 11:17:08 openplotter systemd[1]: signalk.service: Scheduled restart job, restart counter is at 1.
Sep  3 11:17:08 openplotter avahi-daemon[402]: Registering new address record for 127.0.0.1 on lo.IPv4.

Many thanks for your help