MMKdir方法错误

面板版本：11.8.0
系统版本：Alibaba Cloud 3 (OpenAnolis Edition)
问题表现：
设置PHP网站反向代理时系统报错：
File ＂/www/server/panel/BTPanel/__init__.py＂, line 2577, in publicObject
    res = run_obj.run(toObject, defs, get)
  File ＂/www/server/panel/BTPanel/__init__.py＂, line 2523, in run
    result = getattr(toObject, get.action)(get)
  File ＂/www/server/panel/class/panelSite.py＂, line 4997, in CreateProxy
    status = self.SetProxy(get)
  File ＂/www/server/panel/class/panelSite.py＂, line 5313, in SetProxy
    public.MMkdir(ng_proxydir, 0o755, ＂P＂)
AttributeError: module ＇public＇ has no attribute ＇MMkdir＇

经查：
1. panelSite.py 5313 行：public.MMkdir(ng_proxydir, 0o755, "P")
2. public.py 9360 行：def Mkdir(path, mode=0o755, types=None):