system
python version 3.7.0
allennlp version 1.1.0

Traceback (most recent call last):
File "c:\users\dasd\anaconda3\lib\runpy.py", line 193, in run_module_as_main
"main", mod_spec)
File "c:\users\dasd\anaconda3\lib\runpy.py", line 85, in run_code
exec(code, run_globals)
File "C:\Users\DASD\Anaconda3\Scripts\allennlp.exe_main.py", line 7, in
File "c:\users\dasd\anaconda3\lib\site-packages\allennlp_main.py", line 34, in run
main(prog="allennlp")
File "c:\users\dasd\anaconda3\lib\site-packages\allennlp\commands_init_.py", line 91, in main
import_module_and_submodules(package_name)
File "c:\users\dasd\anaconda3\lib\site-packages\allennlp\common\util.py", line 340, in import_module_and_submodules
module = importlib.import_module(package_name)
File "c:\users\dasd\anaconda3\lib\importlib_init_.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "", line 1006, in _gcd_import
File "", line 983, in _find_and_load
File "", line 967, in _find_and_load_unlocked
File "", line 677, in load_unlocked
File "", line 728, in exec_module
File "", line 219, in call_with_frames_removed
File "E:\code\git\qa_explanation_init.py", line 3, in
from qa_explanation.indexers import *
File "E:\code\git\qa_explanation\indexers_init.py", line 1, in
from qa_explanation.indexers.pretrained_transformer_indexer import PretrainedTransformerIndexerLocal
File "E:\code\git\qa_explanation\indexers\pretrained_transformer_indexer.py", line 18, in
class PretrainedTransformerIndexerLocal(TokenIndexer[int]):
TypeError: 'type' object is not subscriptable

can you tell me what's wrong with me ?