set use_cache=true in config.json

config.json

@@ -18,6 +18,6 @@
   "tie_word_embeddings": false,
   "torch_dtype": "float32",
   "transformers_version": "4.28.0.dev0",
-  "use_cache": false,
+  "use_cache": true,
   "vocab_size": 32000
 }