关于linux scons 命令scons --menuconfig 在之前是好的，隔一段时间没有用，报如下错误？

scons --menuconfig
scons:Reading SConscript files ...
AttributeError: 'str' object has no attribute 'load_config'
File "SConstruct", line 33:
objs = PrepareBuilding(env, RTT_ROOT, has_libcpu=False)
File "rt-thread/tools/building.py", line 384:
menuconfig(Rtt_Root)
File ".local/lib/python3.8/site-packages/menuconfig.py", line 685:
_conf_changed = _load_config()
File ".local/lib/python3.8/site-packages/menuconfig.py", line 741:
print(_kconf.load_config())