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: [{re,split,
            [undefined,"/",[{return,list}]],
            [{file,"re.erl"},
             {line,969},
             {error_info,#{module => erl_stdlib_errors}}]},
        {pi1001,process_query,2,[{file,"pi1001.erl"},{line,513}]},
        {pi1001,out,1,[{file,"pi1001.erl"},{line,546}]},
        {yaws_server,deliver_dyn_part,8,
                     [{file,"yaws_server.erl"},{line,2922}]},
        {yaws_server,aloop,4,[{file,"yaws_server.erl"},{line,1261}]},
        {yaws_server,acceptor0,2,[{file,"yaws_server.erl"},{line,1060}]},
        {proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,240}]}]