Login and hash pages not found

I'm having trouble accessing /-/password-tool and /-/login.

On my Arch Linux machine in a virtual environment running Python 3.8.5, I ran pip install datasette-auth-passwords.

I edited metadata.json so it includes:

"plugins": {
     "datasette-auth-passwords": {
        "someusername_password_hash": {
            "$env": "PASSWORD_HASH_1"
        }
     }
}

I used the password tool to create a hash.

In my terminal, I ran this:

PASSWORD_HASH_1='pbkdf2_sha256$...' datasette serve databases/*.db -m metadata.json --template-dir=templates/ --debug

(The ... represents the rest of the hash that I didn't paste here of course.)

When I navigated my browser to http://127.0.0.1:8001/-/login I was met with an "Error 404" page.