Fixing additional potential error

Author: sanders41

meilisearch/errors.py

@@ -21,9 +21,10 @@ def __init__(self, error: str, request: Response) -> None:
         self.error_link = None
 
         if request.text:
-            self.message = f'{json.loads(request.text)["message"]}'
-            self.error_code = f'{json.loads(request.text)["errorCode"]}'
-            self.error_link = f'{json.loads(request.text)["errorLink"]}'
+            json_data = json.loads(request.text)
+            self.message = json_data.get('message')
+            self.error_code = json_data.get('errorCode')
+            self.error_link = json_data.get('errorLink')
         else:
             self.message = error
         super().__init__(self.message)