bert.js decode error on the server: badarg

[xafizoff]

listen() ->
    nitro:wire(#bind{target=svg,type=edit,postback=
                         ["ws.send(enc(tuple(atom('pickle'),atom('svg'),bin('",
                          n2o:pickle(#ev{module=?MODULE,msg={edit,svg},name=event}),
                          "'),list(tuple(atom('id'),number(event.detail.id)),",
                          "tuple(atom('action'),bin(event.detail.action)),",
                          "tuple(atom('svg'),querySource('svg'))",
                          "))));"]}).

event({edit,svg}) -> Id  = nitro:q(id),
                     Svg = #proc{flows=Flows,tasks=Tasks} = nitro:q(svg),
                     case nitro:q(action) of
                         <<"deleteflow">> -> {reply,Svg#proc{flows=[F||F<-Flows,F#flow.id/=Id]}};
                         <<"edittask">> -> ok end;

This works nicely, but if I change bin(event.detail.action) to atom(event.detail.action) I get

{[{reason,badarg},
  {mfa,{n2o_stream,websocket_handle,3}},
  {stacktrace,
      [{erlang,binary_to_term,
           [<<131,104,4,100,0,6,112,105,99,107,108,101,100,0,3,115,118,103,109,
              0,0,0,192,57,97,53,98...
           >>], [safe]], []}, 
           ...

[xafizoff]

My atom is not registered in the virtual machine. See #3