Model file not recognized in rasa shell for 3.0 RC1

[tayfun]

Rasa Open Source version

3.0.0rc1

Rasa SDK version

No response

Rasa X version

No response

Python version

3.8

What operating system are you using?

OSX

What happened?

1. Init a new project - either in current directory or a new one, it doesn't matter
2. If you speak to the assistant during rasa init, it works; but if you run rasa shell afterwards, you get this error:

$ rasa shell
Traceback (most recent call last):
...
IsADirectoryError: [Errno 21] Is a directory: 'models/20211108-105331.tar.gz'

If you check directory structure it is really a directory:

$ tree models/
models/
└── 20211108-105331.tar.gz
    └── 20211108-105334-inclusive-dam.tar.gz

1 directory, 1 file

Removing models directory and running rasa train fixes the problem:

 $ tree models/
models/
├── 20211108-104603.tar.gz
└── 20211108-104824-spicy-teaser.tar.gz

1 directory, 1 file

Command / Request

No response

Relevant log output

No response