Vim Nerdtree plugin cannot open directory, display? ~v?

In the Ubuntu Docker image, the Nerdtree plugin is installed for vim, but the "+" should be displayed on the left side of the directory, but it becomes "? ~v" and the directory cannot be opened.

Solution:

Edit the Nerd_tree.vim file to

If !nerdtree#runningwindows ()  && !nerdtree#runningcygwin ()                                         call s: Initvariable ("g:nerdtreedirarrowexpandable",  "? ~v?")                                   call s: Initvariable ("g:nerdtreedirarrowcollapsible",  "? ~v?")                              else                                                                                                 call s:initvariable ("G:nerdtreedirarrowexpandable",  "+")                                       call s:initvariable ("g:nerdtreedirarrowcollapsible",  "~")                                  endif

Change to:

"If !nerdtree#runningwindows ()  && !nerdtree#runningcygwin ()                                      "    call s: Initvariable ("g:nerdtreedirarrowexpandable",  "? ~v?")                                "    call s: Initvariable ("g:nerdtreedirarrowcollapsible",  "? ~v?")                               "else                                                                                                 call s:initvariable ("G:nerdtreedirarrowexpandable",  "+")                                       call s:initvariable ("g:nerdtreedirarrowcollapsible",  "~")                                   "endif

Vim Nerdtree plugin cannot open directory, display? ~v?