when logging in on the lock screen or tty terminal interface : nknown error occurred

howdy version:Howdy 3.0.0 BETA
Linux distribution:debian 12.4 bookworm
de: gnome 43.9
dm:gdm

After entering the graphical interface, Howdy works fine, but when I lock the screen or log out and log back in, the camera flashes briefly and then shows an error.

I tried logging in using the tty interface and encountered the same error, along with an error code.

```
login:
Traceback (most recent call last):
File "/lib/security/howdy/compare.py",line 262, in
hist_total = np.sum(hist)
AttributeError: module 'numpy' has no attribute 'sum'
Password：
nknown error:
```

I have confirmed that the numpy module is installed, and executing "python3 /lib/security/howdy/compare.py" did not result in any errors.

----

I've searched for similar issues already, and my issue has not been reported yet.

Linux distribution (if applicable):

Howdy version (`sudo howdy version`):

Start with /lib/security/howdy/compare.py at line 262 and reproduce the failure through the lock screen and tty, then compare that environment with running `python3 /lib/security/howdy/compare.py` directly. Trace the PAM login entry point and the reported NumPy error. Done means authentication works without the unknown error in both login contexts.

Written by the indexing model from the issue text.