Unable to get logs on 181

Server error during processing: ["web request failed",
{path,"/diag"},
{type,error},
{what,badarg},
{trace,
[{io_lib,format,
["~s ~s:~B:~s:~s(~s) - ~s~n",
[["2012",45,
["0",52],
45,"11",32,"23",58,
["0",54],
58,
["0",53],
46,"506"],
ns_cluster,undefined,<<"info">>,
"message",'ns_1@10.1.3.74',
[83,116,97,114,116,101,100,32,110,111,
100,101,32,97,100,100,32,116,114,97,
110,115,97,99,116,105,111,110,32,98,
121,32,97,100,100,105,110,103,32,110,
111,100,101,32,"'ns_1@10.1.3.75'",32,
116,111,32,110,111,100,101,115,95,119,
97,110,116,101,100,"\n",32,40,114,101,
112,101,97,116,101,100,32,"1",32,116,
105,109,101,115,41]]]},
{diag_handler,'-do_handle_diag/3-fun-2-',2},
{lists,foreach,2},
{diag_handler,do_handle_diag,3},
{menelaus_web,loop,3},
{mochiweb_http,headers,5},
{proc_lib,init_p_do_apply,3}]}] (repeated 1 times)