Syncthing / permissions — Create a share with existing folder

Hi @Jan.DEV-CORPS ,

Have you been able to enjoy syncthing with no problem since then?
I am trying to use the /home/yunohost.multimedia/share folder to create a shared file zone that is shared among the users.
I am very new to the ACL file permissions, so I looked at the man page to understand better.
So here where I ended up:

$ id syncthing
uid=993(syncthing) gid=993(syncthing) groups=993(syncthing)
$ sudo setfacl -Rmb g:syncthing:rwX,d:g:syncthing:rwX,u:syncthing:rwX,d:u:syncthing:rwX /home/yunohost.multimedia/share/
setfacl: Option -m: Invalid argument near character 
$ sudo setfacl -Rb g:syncthing:rwX,d:g:syncthing:rwX,u:syncthing:rwX,d:u:syncthing:rwX /home/yunohost.multimedia/share/
setfacl: g:syncthing:rwX,d:g:syncthing:rwX,u:syncthing:rwX,d:u:syncthing:rwX: No such file or directory

I don’t see any particular change int he behavior, any help would be very welcome.