[Python] Cannot convert '<!-' to unsigned int

I'm trying to print the number of atoms in a molecule with rdkit, but i keep running into this problem even though the code is roughly the same as the tutorial i was following:

[17:11:25] Cannot convert '<!-' to unsigned int on line 4
Traceback (most recent call last):
File "c:\Users\frede\OneDrive\Skrivebord\Projekter\Python\Kemi\main.py", line 9, in <module>
text = morphine.GetNumAtoms()
^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'GetNumAtoms'


I'm running python in VSCode, using rdkit which i installed directly with pip (I don't have anaconda installed).

Here is the code i wrote:

from rdkit import Chem
import requests

morphine_url = 'https://go.drugbank.com/structures/small_molecule_drugs/DB00295.mol'
morphine_mol = requests.get(morphine_url).text

morphine = Chem.MolFromMolBlock(morphine_mol)

text = morphine.GetNumAtoms()

print(text)


What confuses me the most is the "Cannot convert '<!-' to unsigned int on line 4" part, as i can't find any information as to what '<!-' actually means.

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