Go To Definition/Peek Definition Got Error about vscode_erlang HOT 4 CLOSED

=INFO REPORT==== 15-Jun-2018::14:44:53 ===
LSP sends #{id => 12,result => #{contents => <<>>}}

=INFO REPORT==== 15-Jun-2018::14:44:56 ===
LSP received #{id => 13,jsonrpc => <<"2.0">>,
               method => <<"textDocument/definition">>,
               params =>
                   #{position => #{character => 24,line => 326},
                     textDocument =>
                         #{uri =>
                               <<"file:///Users/xxxxxxxxxxxxxxxxxxxxx.erl">>}}}

=INFO REPORT==== 15-Jun-2018::14:44:56 ===
LSP handler returned '<<"Definition not found">>'
=INFO REPORT==== 15-Jun-2018::14:44:56 ===
LSP sends #{error => #{code => -32001,message => <<"Definition not found">>},
            id => 13}
[Error - 14:44:56] Request textDocument/definition failed.
  Message: Definition not found
  Code: -32001