diff --git a/source/server.js b/source/server.js
index <HASH>..<HASH> 100644
--- a/source/server.js
+++ b/source/server.js
@@ -338,9 +338,9 @@ app.get('/api/fs/listDirectories', ensureAuthenticated, function(req, res) {
           });
           async.filter(absolutePaths, function(absolutePath, callback) {
             fs.stat(absolutePath, function(err, stat) {
-              callback(!err && stat && stat.isDirectory());
+              callback(null, !err && stat && stat.isDirectory());
             });
-          }, function(filteredFiles) {
+          }, function(err, filteredFiles) {
             res.json(filteredFiles);
           });
         }
fix callback arguments for async.filter so directory autocomplete works again

this was a breaking change in the async library <I>
<URL>