ver Jan27th

debugged at+screenshot implementation, no issues found
fixed a little bugs

desktop_env/envs/desktop_env.py

@@ -76,6 +76,8 @@ class DesktopEnv(gym.Env):
         self.cache_dir_base: str = cache_dir
         self.vm_screen_size = screen_size
 
+        os.makedirs(self.tmp_dir_base, exist_ok=True)
+
         # task-aware stuffs
         # todo: handling the logic of snapshot directory
         self._set_task_info(task_config)