conda-script.py: error: unrecognized arguments: nltk - Jupiter Notebook

[MacHass]

Hello everyone. I am trying to download nltk into my notebook but get an error message everytime.

Here is what I input
conda install -c conda-forge nltk

Here is the error message I see everytime.
Note: you may need to restart the kernel to use updated packages.
usage: conda-script.py [-h] [-V] command ...
conda-script.py: error: unrecognized arguments: nltk

I have tried reseting the Kernal, closing the program and trying on a blank notebook but nothing seems to work. Let me know what I can do to fix this!!! Thanks