Tree map fails to display

The tree-map display of the profile shows nothing under jammy. The following output appears on the console:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/runsnakerun/runsnake.py", line 633, in OnSquareHighlightedList
    self.squareMap.SetHighlight(event.node, propagate=False)
  File "/usr/lib/python3/dist-packages/squaremap/squaremap.py", line 212, in SetHighlight
    self.UpdateDrawing()
  File "/usr/lib/python3/dist-packages/squaremap/squaremap.py", line 247, in UpdateDrawing
    self.Draw(dc)
  File "/usr/lib/python3/dist-packages/squaremap/squaremap.py", line 257, in Draw
    font = self.FontForLabels(dc)
  File "/usr/lib/python3/dist-packages/squaremap/squaremap.py", line 267, in FontForLabels
    font.SetPointSize(scale * font.GetPointSize())
TypeError: Font.SetPointSize(): argument 1 has unexpected type 'float'

Unfortunately, the tree-map is one of the major features of runsnakerun. This appears to be a regression in squaremap under a later wxgtk build, but whilst the Font.SetPointSize regression is easily patchable that then leads to a bunch of other failures.