Add error msg display for API

app.py

@@ -45,7 +45,7 @@ def predict(text, seed, out_seq_length, min_gen_length, sampling_strategy,
         return 'Timeout! Please wait a few minutes and retry'
     
     if response['status'] == 1:
-        return 'Please give smaller text than max_tokens or give larger max_tokens.'
+        return response['result']['errmsg']
     
     answer = response['result']['output']['raw']
     if isinstance(answer, list):