only size-1 arrays can be converted to Python scalars error

[K-Meech]

Sometimes when 'Solve Camera Pose' is clicked, the following error occurs from openCV:

  File "C:\Users\kimbe\Documents\Repos\Blender-dev\addons\image-matcher\pnp.py", line 439, in execute
    return solve_pnp(*get_scene_info(self, context))
  File "C:\Users\kimbe\Documents\Repos\Blender-dev\addons\image-matcher\pnp.py", line 226, in solve_pnp
    ("Reprojection Error: %.2f" % error) if ret else "solvePnP failed!"
TypeError: only size-1 arrays can be converted to Python scalars

This tends to happen when the point pairs are poorly placed leading to a bad match. It seems this results in the returned reprojection error being of length 2 (rather than 1)