Data cardinality is ambiguous: x sizes: 1, 250, 250 Please provide data which shares the same first dimension

Question

def decode_sequence(inp_seq):

enc_out,enc_h,enc_c=infencoder_model.predict(inp_seq)

tar_seq=np.zeros((1,1))
tar_seq[0,0]=sum_wordindex[\'start\']
stop_loop=False
d