'type' object is not subscriptable

[liuliuliuqinrui]

Hi , thank u for u open your code , it is very wonderful ,
but i meet a problem ,when i run "allenact -s 23456 configs/ithor_ObsNav/obstacles_nav_rgbdk_vNIE.py -c pretrained_model_ckpts/model.pth --eval"
The error is: TypeError: 'type' object is not subscriptable
Traceback (most recent call last):
File "/home/csuu/miniconda3/envs/lqr/bin/allenact", line 8, in
sys.exit(main())
File "/home/csuu/miniconda3/envs/lqr/lib/python3.6/site-packages/allenact/main.py", line 382, in main
cfg, srcs = load_config(args)
File "/home/csuu/miniconda3/envs/lqr/lib/python3.6/site-packages/allenact/main.py", line 319, in load_config
module = importlib.import_module(module_path)
File "/home/csuu/miniconda3/envs/lqr/lib/python3.6/importlib/init.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "", line 994, in _gcd_import
File "", line 971, in _find_and_load
File "", line 955, in _find_and_load_unlocked
File "", line 665, in _load_unlocked
File "", line 678, in exec_module
File "", line 219, in _call_with_frames_removed
File "/home/csuu/lqr/Interactive_Visual_Navigation/configs/ithor_ObsNav/obstacles_nav_rgbdk_vNIE.py", line 12, in
from interactive_navigation.sensors import (
File "/home/csuu/lqr/Interactive_Visual_Navigation/interactive_navigation/sensors.py", line 18, in
class RGBSensorThor(RGBSensor[IThorEnvironment, Task[IThorEnvironment]]):

Can u tell me how to solve the problem thank u!