Medias don't sync with anki 2.1.26

[smartlitchi]

Hello, I followed the instructions on the README.md and everything works fine except medias. There is no sync error on anki 2.1.26 but when I open the media log, I see this :

Wed Dec  2 21:19:34 2020: Media sync starting...
Wed Dec  2 21:19:34 2020: Please check your internet connection.

Error details: ⁨error sending request for url (): error trying to connect: dns error: 
failed to lookup address information: Name or service not known⁩

As previously stated, the cards are synced, only the medias are missing.

Here is my nginx reverse proxy :

server {
        server_name <url>;
                location / {
                proxy_http_version 1.0;
                proxy_pass http://localhost:27701/;
            }
    client_max_body_size 10M;

    listen 443 ssl; # managed by Certbot
    <ssl certificate via Certbot>
}

Edit : The problem seems to occur only with the desktop version (2.1.26), the media sync works with ankidroid (14.1)

[smartlitchi]

After further investigation, the error seems to come from the __init__.py of the ankisyncd addon given in README.md. I followed the instructions here : tsudoko/anki-sync-server#63 and added this line aqt.mediasync.SYNC_BASE = "%s" + addr

import anki.sync, anki.hooks, aqt

addr = "http://127.0.0.1:27701/" # put your server address here
anki.sync.SYNC_BASE = "%s" + addr
aqt.mediasync.SYNC_BASE = "%s" + addr
def resetHostNum():
    aqt.mw.pm.profile['hostNum'] = None
anki.hooks.addHook("profileLoaded", resetHostNum)

There is some progress in what I see in the Media Log but the issue is not fixed yet :

Thu Dec  3 17:22:30 2020: Media sync starting...
Thu Dec  3 17:22:30 2020: A network error occurred.

Error details: ⁨builder error: relative URL without a base⁩

[smartlitchi]

I am closing this since I am no longer using anki 2.1.26