cannot import name 'StyleTTS2' from 'styletts2'

[0wwafa]

$ python3
Python 3.10.12 (main, Aug 15 2025, 14:32:43) [GCC 11.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from styletts2 import StyleTTS2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name 'StyleTTS2' from 'styletts2' (/home/robert/.local/lib/python3.10/site-packages/styletts2/__init__.py)
>>>

WHY?