My TeaMaster9001 is responding with code 418 whenever I send a brew-coffee request

Question

My TeaMaster9001 is running on my IoT network, and it has an IP address of 172.16.1.10. Whenever I send a GET request in Python 3.9.5, I get a requests.exceptions.HTTPError.

Here is my code (brew-coffee.py):

import requests

response = requests.get("http://172.16.1.10/brew-coffee")

response.raise_for_status()

print(response.content)

...and here is the output:

Traceback (most recent call last):
  File "C:\Users\perzan\scripts\brew-coffee.py", line 5, in <module>
    response.raise_for_status()
  File "C:\Users\perzan\scripts\scripts-env\lib\site-packages\requests\models.py", line 943, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 418 Client Error: I'M A TEAPOT for url: http://172.16.1.10/brew-coffee

What is going on? Does the TeaMaster9001 not support brewing coffee? Is it something with my code? I think I may be missing some dependencies...