Are you using the cuda backend? If so you may also need to add the cuda paths. For example:
export LD_LIBRARY_PATH=/usr/local/cuda/lib64:/usr/local/cuda/nvvm/lib64/:/opt/arrayfire/lib64/:$LD_LIBRARY_PATH
More details here: https://github.com/arrayfire/arrayfire-python/wiki
If that doesn't help, can you show the specific error message you are seeing? This may be better suited for the arrayfire-org slack channel...

After change I run python -m arrayfire.tests, it gives different error:
(base) ztzhao@cw1:~$ python -m arrayfire.tests
Simple algorithm: FAILED

ERROR:root:Traceback (most recent call last):
File "/home/ztzhao/anaconda3/lib/python3.7/site-packages/arrayfire/tests/simple/_util.py", line 32, in run
test(verbose)
File "/home/ztzhao/anaconda3/lib/python3.7/site-packages/arrayfire/tests/simple/algorithm.py", line 20, in simple_algorithm
af.eval(k)
File "/home/ztzhao/anaconda3/lib/python3.7/site-packages/arrayfire/device.py", line 218, in eval
__eval(*args)
File "/home/ztzhao/anaconda3/lib/python3.7/site-packages/arrayfire/device.py", line 168, in __eval
safe_call(backend.get().af_eval(args[0].arr))
File "/home/ztzhao/anaconda3/lib/python3.7/site-packages/arrayfire/util.py", line 79, in safe_call
raise RuntimeError(to_str(err_str))
RuntimeError: In function cuda::Kernel cuda::buildKernel(int, const string&, const string&, const std::vector<std::basic_string >&, bool)
In file src/backend/cuda/nvrtc/cache.cpp:

Simple arith: FAILED
arrayfire.Array()
Type: float

[

ERROR:root:Traceback (most recent call last):
File "/home/ztzhao/anaconda3/lib/python3.7/site-packages/arrayfire/tests/simple/_util.py", line 32, in run
test(verbose)
File "/home/ztzhao/anaconda3/lib/python3.7/site-packages/arrayfire/tests/simple/arith.py", line 21, in simple_arith
display_func(b)
File "/home/ztzhao/anaconda3/lib/python3.7/site-packages/arrayfire/tests/simple/_util.py", line 50, in print_func_impl
_print_log += str(arg) + '\n'
File "/home/ztzhao/anaconda3/lib/python3.7/site-packages/arrayfire/array.py", line 1300, in str
return self._get_metadata_str(dims=False) + self._as_str()
File "/home/ztzhao/anaconda3/lib/python3.7/site-packages/arrayfire/array.py", line 1320, in _as_str
safe_call(be.af_array_to_string(c_pointer(arr_str), "", self.arr, 4, True))
File "/home/ztzhao/anaconda3/lib/python3.7/site-packages/arrayfire/util.py", line 79, in safe_call
raise RuntimeError(to_str(err_str))
RuntimeError: In function void print(const char*, af_array, int, std::ostream&, bool) [with T = float; af_array = void*; std::ostream = std::basic_ostream]
In file src/api/c/print.cpp:

Simple array: FAILED
arrayfire.Array()
Type: float

[
arrayfire.Array()
Type: float

[
arrayfire.Array()
Type: float

[
(3,)

ERROR:root:Traceback (most recent call last):
File "/home/ztzhao/anaconda3/lib/python3.7/site-packages/arrayfire/tests/simple/_util.py", line 32, in run
test(verbose)
File "/home/ztzhao/anaconda3/lib/python3.7/site-packages/arrayfire/tests/simple/array_test.py", line 26, in simple_array
display_func(b)
File "/home/ztzhao/anaconda3/lib/python3.7/site-packages/arrayfire/tests/simple/_util.py", line 50, in print_func_impl
_print_log += str(arg) + '\n'
File "/home/ztzhao/anaconda3/lib/python3.7/site-packages/arrayfire/array.py", line 1300, in str
return self._get_metadata_str(dims=False) + self._as_str()
File "/home/ztzhao/anaconda3/lib/python3.7/site-packages/arrayfire/array.py", line 1320, in _as_str
safe_call(be.af_array_to_string(c_pointer(arr_str), "", self.arr, 4, True))
File "/home/ztzhao/anaconda3/lib/python3.7/site-packages/arrayfire/util.py", line 79, in safe_call
raise RuntimeError(to_str(err_str))
RuntimeError: In function void print(const char*, af_array, int, std::ostream&, bool) [with T = int; af_array = void*; std::ostream = std::basic_ostream]
In file src/api/c/print.cpp:

Segmentation fault (core dumped)