Marco says:
File "Set Kerning Groups.py", line 993
updateKeyGlyphsForSelected()
^
TabError: inconsistent use of tabs and spaces in indentation
Marco says:
File "Set Kerning Groups.py", line 993
updateKeyGlyphsForSelected()
^
TabError: inconsistent use of tabs and spaces in indentation
This is not the latest version of the script. Best to update by un- and reinstalling through Window > Plugin Manager.