Traefik can't start - port already in use

Hi there,
I just setted SSL certificate to a brand new Linode (Docker) STAGING server using this tuto and it worked perfectly - I wanted to try the process first. The project was not deployed when I deployed the services (Traefik only).

Then i tryed to add traefik/Let’s Encrypt to my PRODUCTION (Docker) server doing the same process.

• I changed username/pwd
• I setted everything correctly and tried to deploy services (Traefik indeed) for this Server.
• The service didn’t deploy :

Capture d’écran 2023-01-17 à 09.58.283512×316 91.2 KB

• I double checked my Target settings (Port mostely) and it seems correct :
  
  

  Capture d’écran 2023-01-17 à 09.59.331800×904 62.3 KB

My domain is correctly setted in my registrar A zone (IP is the good one).
My project is (and was) already published in production before deploying the Traefik service (Is this why?)

I tried to restart Wappler several times, i tried restarting my Mac, re-setting the Traefik infos, re-setting Targets… and get the same erro message

Thanks for your help.
Sylvain