EF_Tools-Sheets-EF Sheet Generator not working

[houpr]

Revit 2022.1
 pyRevit v4.8.14

 I just installed EF-Tools and tried Sheet Generator tool. Immediately console with error came out.

 Error Message:

Traceback (most recent call last):
File "Q:\Kuba\pyKuba\EF-Tools.extension\EF_Tools.tab\Sheets.panel\col1.stack\EF_SheetGenerator.pushbutton\script.py", line 550, in
UI = EF_SheetGenerator()
File "Q:\Kuba\pyKuba\EF-Tools.extension\EF_Tools.tab\Sheets.panel\col1.stack\EF_SheetGenerator.pushbutton\script.py", line 150, in init
self.populate_title_blocks_combo()
File "Q:\Kuba\pyKuba\EF-Tools.extension\EF_Tools.tab\Sheets.panel\col1.stack\EF_SheetGenerator.pushbutton\script.py", line 313, in populate_title_blocks_combo
combo_item.IsSelected = True
UnboundLocalError: Local variable 'combo_item' referenced before assignment.