process.env is an object

src/controllers/index.js

@@ -118,7 +118,7 @@ Controllers.register = function(req, res, next) {
 	data.error = req.flash('error')[0];
 
 	plugins.fireHook('filter:register.build', {req: req, res: res, templateData: data}, function(err, data) {
-		if (err && process.env === 'development') {
+		if (err && global.env === 'development') {
 			winston.warn(JSON.stringify(err));
 			return next(err);
 		}