Internal error, yaws code crashed



ERROR erlang code threw an uncaught exception:
 File: appmod:0
Class: error
Exception: badarg
Req: {http_request,'GET',{abs_path,"/"},{1,1}}
Stack: [{simple_bridge_request,make,2,
                               [{file,"lib/referl_ui/nitrogen/apps/simple_bridge/src/simple_bridge_request.erl"},
                                {line,17}]},
        {nitrogen_yaws,out,1,
                       [{file,"lib/referl_ui/nitrogen/site/src/nitrogen_yaws.erl"},
                        {line,5}]},
        {yaws_server,deliver_dyn_part,8,
                     [{file,"yaws_server.erl"},{line,2893}]},
        {yaws_server,aloop,4,[{file,"yaws_server.erl"},{line,1262}]},
        {yaws_server,acceptor0,2,[{file,"yaws_server.erl"},{line,1073}]},
        {proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,249}]}]