fairseq: ERROR: missing temporal_convolution_tbc, run `python setup.py install`

Hello,I am a green hand.when i use CUDA_VISIBLE_DEVICES=6 python train.py data-bin/iwslt14.tokenized.de-en --lr 0.25 --clip-norm 0.1 --dropout 0.2 --max-tokens 4000 --arch fconv_iwslt_de_en --save-dir checkpoints/fconv

I meet a error .

ERROR: missing temporal_convolution_tbc, run python setup.py install Traceback (most recent call last): File “train.py”, line 14, in <module> from fairseq import bleu, data, options, utils File “/home/hfyu/fairseq16/fairseq-py-master/fairseq/options.py”, line 11, in <module> from fairseq import models File “/home/hfyu/fairseq16/fairseq-py-master/fairseq/models/init.py”, line 9, in <module> from . import fconv File “/home/hfyu/fairseq16/fairseq-py-master/fairseq/models/fconv.py”, line 14, in <module> from fairseq.modules import BeamableMM, LinearizedConvolution File “/home/hfyu/fairseq16/fairseq-py-master/fairseq/modules/init.py”, line 10, in <module> from .conv_tbc import ConvTBC File “/home/hfyu/fairseq16/fairseq-py-master/fairseq/modules/conv_tbc.py”, line 18, in <module> raise e File “/home/hfyu/fairseq16/fairseq-py-master/fairseq/modules/conv_tbc.py”, line 14, in <module> from fairseq import temporal_convolution_tbc File “/home/hfyu/fairseq16/fairseq-py-master/fairseq/temporal_convolution_tbc/init.py”, line 3, in <module> from ._temporal_convolution_tbc import lib as _lib, ffi as _ffi ImportError: /home/hfyu/fairseq16/fairseq-py-master/fairseq/temporal_convolution_tbc/_temporal_convolution_tbc.so: undefined symbol: _ZNK2at4Type4copyERKNS_6TensorERS1

I donnot know how to deal with it ,Could you help me?Thankyou.