ValueError: Can't load save_path when it is None. about aidungeon HOT 4 CLOSED

Cloning into 'AIDungeon'... remote: Enumerating objects: 47, done.
...
Downloading AIDungeon2 Model... (this may take a very, very long time)
... We are now starting to download the model. It will take a while to get up to speed. 
DHT errors are normal.
...

Download Complete!

AI Dungeon 2 will save and use your actions and game to continually improve AI
 Dungeon. If you would like to disable this enter 'nosaving' for any action.
 This will also turn off the ability to save games.

Initializing AI Dungeon! (This might take a few minutes)

Generating story...

You are Andreas, a wizard living in the kingdom of Larion. You have a staff and
 a spellbook. You finish your long journey and finally arrive at the ruin you've
 been looking for. You look around and see that it's not much different than
 when you left it.
As you walk through the ruins, you hear voices behind you. It's another group
 of people who want to know what happened to you

!git clone --depth 1 --branch master https://github.com/nickwalton/AIDungeon/
%cd AIDungeon
!git log

commit 75f6379039018cba719c05b7fd6216f1f34274d2 (grafted, HEAD -> master, origin/master, origin/HEAD)
Author: Nick Walton <[email protected]>
Date:   Sat Dec 7 16:31:30 2019 -0700
...