Extension library loading only works on Python 3.8

[tinyAdapter]

I found that the sample code only works in Python 3.8 but not other versions.

When I compile and link with others like 3.7, 3.9 and 3.10, the main program will crash with the error

terminate called after throwing an instance of 'pybind11::error_already_set'
  what():  ImportError: /home/user/anaconda3/envs/customloader/lib/python3.10/lib-dynload/unicodedata.cpython-310-x86_64-linux-gnu.so: undefined symbol: _PyUnicode_Ready

At:
  /home/user/anaconda3/envs/customloader/lib/python3.10/site-packages/regex/_regex_core.py(18): <module>
  <frozen importlib._bootstrap>(241): _call_with_frames_removed
  <frozen importlib._bootstrap_external>(883): exec_module
  <frozen importlib._bootstrap>(703): _load_unlocked
  <frozen importlib._bootstrap>(1006): _find_and_load_unlocked
  <frozen importlib._bootstrap>(1027): _find_and_load
  /home/user/anaconda3/envs/customloader/lib/python3.10/site-packages/regex/regex.py(421): <module>
  <frozen importlib._bootstrap>(241): _call_with_frames_removed
  <frozen importlib._bootstrap_external>(883): exec_module
  <frozen importlib._bootstrap>(703): _load_unlocked
  <frozen importlib._bootstrap>(1006): _find_and_load_unlocked
  <frozen importlib._bootstrap>(1027): _find_and_load
  /home/user/anaconda3/envs/customloader/lib/python3.10/site-packages/regex/__init__.py(1): <module>
  <frozen importlib._bootstrap>(241): _call_with_frames_removed
  <frozen importlib._bootstrap_external>(883): exec_module
  <frozen importlib._bootstrap>(703): _load_unlocked
  <frozen importlib._bootstrap>(1006): _find_and_load_unlocked
  <frozen importlib._bootstrap>(1027): _find_and_load
  <string>(2): <module>

Aborted (core dumped)

It seems that the effort on supporting C extensions does not work at all. But with Python 3.8 the main program runs normally.

I'm not familiar with CPython, so I have no idea why this could happen. Could you please share some thoughts on this problem?