Update config.json

config.json

@@ -11,6 +11,7 @@
   "layer_norm_eps": 1e-12,
   "max_position_embeddings": 512,
   "type_vocab_size": 2,
-  "vocab_size": 29874,
+  "vocab_size": 29744,
+  "pad_token_id": 0,
   "model_type": "electra"
 }