VLC updates, and some infra bugs fix

desktop_env/evaluators/getters/file.py

@@ -1,6 +1,6 @@
+import os
 from typing import Dict
 
-import os
 import requests
 
 
@@ -37,11 +37,16 @@ def get_vm_file(env, config: Dict[str, str]) -> str:
     _path = os.path.join(env.cache_dir, config["dest"])
 
     file = env.controller.get_file(config["path"])
+
+    if file is None:
+        raise FileNotFoundError("File not found on VM: {:}".format(config["path"]))
+
     with open(_path, "wb") as f:
         f.write(file)
 
     return _path
 
+
 def get_cache_file(env, config: Dict[str, str]) -> str:
     """
     Config: