Add tokenizer type in config.json

config.json

@@ -49,5 +49,6 @@
   "position_embedding_type": "absolute",
   "transformers_version": "4.6.1",
   "type_vocab_size": 2,
-  "vocab_size": 32000
+  "vocab_size": 32000,
+  "tokenizer_class": "PreTrainedTokenizerFast" 
 }