:Helptags cannot process ~/.vim/bundle/cpp_doxygen

set nocompatable
filetype off
set rtp +=~/.vim/bundle/Vundle.vim
call vundle#begin()
"Let vundle manage vundle
Plugin 'gmaric/vundle'
Plugin DoxygenToolkit.vim "Not sure if I need this I kind of want to combine this and "cpp_doxygen
Plugin 'cpp_doxygen'
Plugin 'valloric/youcompleteme'
"let g_ycm_global_extra_conf = '~/.vim/.ycm_extra_conf.py
Plugin 'scrooloose/nerdtree'
Plugin 'scrooloose/syntastic'
"set statusline+=%#warningmsg#
"set statusline+=%{SyntasticStatusLineFlag()}
"set statusline+=%*
"let g:syntastic_c_checkers = []
"let g:syntastic_cpp_checkers = []
"let g:syntastic_auto_loc_list = 1
"let g:syntastic_check_on_open = 1
"let g:syntastic_check_on_wq = 0
Plugin 'airblade/vim-gitgutter'
" install indent guides
Plugin 'kien/rainbow_parentheses.vim'
Plugin 'octol/vim-cpp-enhanced-highlight'
Plugin 'fsharp/vim-fsharp'
call vundle#end
set statusline+=%#warningmsg#
set statusline+=%*
let g:syntastic_c_checkers = []
let g:syntastic_cpp_checkers = []
let g:syntastic_always_populate_loc_list = 1
let g:syntastic_auto_loc_list = 1
let g:syntastic_check_on_open = 1
let g:syntastic_check_on_wq = 0
let g:ycm_global_extra_conf = '~/.vim/.ycm_extra_conf.py'
let g:ycm_add_preview_to_completeopt = 1
let g:ycm_autoclose_preview_window_after_insertion = 1
let g:ycm_key_detailed_diagnostics = '<leader>e'