RatOS Internal error on command:"BED_MESH_CALIBRATE" when using faulty_region

[BDworak]

What happened

When attempting to set faulty_region in a printer.cfg under a custom [bed_mesh] upon completing a BED_MESH_CALIBRATE the printer shuts down with the following error: Internal error on command:"BED_MESH_CALIBRATE".

klippy.log reports

Internal error on command:"BED_MESH_CALIBRATE"
Traceback (most recent call last):
  File "/home/pi/klipper/klippy/gcode.py", line 211, in _process_commands
    handler(gcmd)
  File "/home/pi/klipper/klippy/gcode.py", line 137, in <lambda>
    func = lambda params: origfunc(self._get_extended_params(params))
  File "/home/pi/klipper/klippy/extras/beacon.py", line 2671, in cmd_BED_MESH_CALIBRATE
    self.calibrate(gcmd)
  File "/home/pi/klipper/klippy/extras/beacon.py", line 2906, in calibrate
    matrix = self._process_clusters(clusters, gcmd)
  File "/home/pi/klipper/klippy/extras/beacon.py", line 3079, in _process_clusters
    raise Exception("Error processing mesh: %s" % (result,))
Exception: Error processing mesh: Traceback (most recent call last):
  File "/home/pi/klipper/klippy/extras/beacon.py", line 3062, in do
    (False, self._do_process_clusters(raw_clusters, dump_file))
  File "/home/pi/klipper/klippy/extras/beacon.py", line 3102, in _do_process_clusters
    (error, interpolator_or_msg) = self._load_interpolator()
  File "/home/pi/klipper/klippy/extras/beacon.py", line 3153, in _load_interpolator
    if hasattr(self.scipy.interpolate, "RBFInterpolator"):
  File "/home/pi/klippy-env/lib/python3.9/site-packages/scipy/__init__.py", line 134, in __getattr__
    return _importlib.import_module(f'scipy.{name}')
  File "/usr/lib/python3.9/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 790, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "/home/pi/klippy-env/lib/python3.9/site-packages/scipy/interpolate/__init__.py", line 167, in <module>
    from ._interpolate import *
  File "/home/pi/klippy-env/lib/python3.9/site-packages/scipy/interpolate/_interpolate.py", line 10, in <module>
    import scipy.special as spec
  File "/home/pi/klippy-env/lib/python3.9/site-packages/scipy/special/__init__.py", line 777, in <module>
    from . import _ufuncs
ImportError: libopenblas.so.0: cannot open shared object file: No such file or directory

Transition to shutdown state: Internal error on command:"BED_MESH_CALIBRATE"

What did you expect to happen

A bed mesh to complete and the faulty bed regions to have interpolated values. I am using a magnetic bed and am looking to remove the dips created by the magnets from the bed mesh.

How to reproduce

Create a custom [bed_mesh] configuration in your printer.cfg and add configure faulty_regions then run a BED_MESH_CALIBRATE. Below is my example [bed_mesh] configuration that was causing this issue. This was configured on a Rat Rig vCore4 500 so adjustments may need to be made to accommodate smaller machines.

[bed_mesh]
speed: 800
horizontal_move_z: 2
mesh_min: 30, 30
mesh_max: 480,445 
fade_start: 0.6
fade_end: 10.0
probe_count: 25,25
algorithm: bicubic
zero_reference_position: 250, 290
faulty_region_1_min: 230.0, 1.0
faulty_region_1_max: 270.0, 40.0

Additional information

I was able to find online that the fix for the error

ImportError: libopenblas.so.0: cannot open shared object file: No such file or directory

was to login to the pi via ssh and run

sudo apt-get install libopenblas-dev

Not sure if this is the ideal fix for this, but installing libopenblas-dev had resolved the missing reference issue likely used while the bed mesh attempts to interpolate the bed points I am trying to filter out.