TypeError: Expected int32, got list containing Tensors of type '_Message' instead.

[tusharkgerg]

Got the following error when running the code at:
File "/Users/tushar/workspace/python/impact/cnn_text_classification_original/cnn_text_classification/text_cnn.py", line 57, in init
self.h_pool = tf.concat(3, pooled_outputs)

Error: TypeError: Expected int32, got list containing Tensors of type '_Message' instead.

Please help.. I tried running this on my local system and as well as Google cloud ml-engine. Got the same error in both places.