When I run pyseg_system/code/tests/tracing_grid.sh, there's an error

./tracing_grid.sh
python ../pyseg/scripts/tests/mcf_synthetic_test.py do_short
/home/wenzl/programs/pyseg_system-master/sys/soft/miniconda2/lib/python2.7/site-packages/graph_tool/all.py:40: RuntimeWarning: Error importing draw module, proceeding nevertheless: /home/wenzl/programs/pyseg_system-master/sys/soft/miniconda2/lib/python2.7/site-packages/graph_tool/draw/libgraph_tool_draw.so: undefined symbol: _ZN5Cairo7Context9show_textERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE
warnings.warn(msg, RuntimeWarning)
^CTraceback (most recent call last):
File "../pyseg/scripts/tests/mcf_synthetic_test.py", line 12, in
from pyseg.scripts import mcf_graph
File "/home/wenzl/programs/pyseg_system-master/code/pyseg/init.py", line 12, in
import disperse_io
File "/home/wenzl/programs/pyseg_system-master/code/pyseg/disperse_io/init.py", line 11, in
from disperse_io import *
......

I find there's something wrong with pyseg_system-master/sys/soft/miniconda2/lib/python2.7/site-packages/graph_tool/all.py., which contains a command: from graph_tool.draw import *. As I type this command in python, the same error as above would happen. How can i solve this issue?