Ok donc bird-lg ne connait pas le concept des sheebangs

files/lookingglass/lgproxy/lgproxy.service

@@ -7,7 +7,7 @@ After=network.target
 Type=simple
 User=lgproxy
 Group=lgproxy
-ExecStart=/opt/bird-lg/lgproxy.py
+ExecStart=python /opt/bird-lg/lgproxy.py
 
 [Install]
 WantedBy=multi-user.target

files/lookingglass/lgweb/lgweb.service

@@ -7,7 +7,7 @@ After=network.target
 Type=simple
 User=lgweb
 Group=lgweb
-ExecStart=/opt/bird-lg/lg.py
+ExecStart=python /opt/bird-lg/lg.py
 
 [Install]
 WantedBy=multi-user.target