Exception: Can not find dynamic library on RK1808!

[lkllk]

系统：ubuntu18.04
板子：Rk1808
python版本：python3.6
安装完rknn_toolkit_lite-1.7.3-cp36-cp36m-linux_aarch64.whl，进行测试报下面的错误！
--> Init runtime environment
E Catch exception when init runtime!
E Traceback (most recent call last):
File "/home/zlg/.local/lib/python3.6/site-packages/rknnlite/api/rknn_lite.py", line 144, in init_runtime
async_mode=async_mode, rknn2precompile=rknn2precompile)
File "rknnlite/api/rknn_runtime.py", line 292, in rknnlite.api.rknn_runtime.RKNNRuntime.init
File "rknnlite/api/rknn_runtime.py", line 491, in rknnlite.api.rknn_runtime.RKNNRuntime._load_library
File "rknnlite/api/rknn_runtime.py", line 467, in rknnlite.api.rknn_runtime.RKNNRuntime._get_rknn_api_lib_path
Exception: Can not find dynamic library on RK1808!

help me and thanks!