Fixed: bugs

src/Application.php

@@ -133,7 +133,7 @@ class Application
     {
         if (self::$workspace != '') return self::$workspace . DS . $path;
         $dir = '';
-        $workspace = sr4::getInstance()->getNamespace('workspace');
+        $workspace = Psr4::getInstance()->getNamespace('workspace');
         foreach ($workspace AS $dir) {
             if (is_dir($dir)) $dir = $dir;
         }