Merge pull request #664 from LopeKinz/main

Fix for issue #660

gpt4free/usesless/__init__.py

@@ -144,10 +144,15 @@ class Completion:
         response = Completion.__response_to_json(content)
         return response
 
+
     @classmethod
     def __response_to_json(cls, text) -> str:
         text = str(text.decode("utf-8"))
 
-        split_text = text.rsplit("\n", 1)[1]
-        to_json = json.loads(split_text)
-        return to_json
+        split_text = text.rsplit("\n", 1)
+        if len(split_text) > 1:
+            to_json = json.loads(split_text[1])
+            return to_json
+        else:
+            return None
+