spyder: Spyder 5.1 crash in Ubuntu's Unity

When start Spyder in the terminal I got these

$ spyder
Traceback (most recent call last):
  File "/home/beew/.local/lib/python3.9/site-packages/spyder/api/widgets/menus.py", line 179, in _render
    section, before_section = next(iter_sections)
StopIteration
Traceback (most recent call last):
  File "/home/beew/.local/lib/python3.9/site-packages/spyder/api/widgets/menus.py", line 179, in _render
    section, before_section = next(iter_sections)
StopIteration

Spyder 5.1.1, OS is Ubuntu21.04, Python 3.9.5, PyQt5 5.12.3