"No such file or directory" when using PlugUpdate

Whenever I try to update plugins using PlugUpdate, the following error appears. It doesn't seem that the plugins are being updated. I tried uninstalling the plugins and reinstalling them, but they could not be found when trying to uninstall too. However, when checking the plugged folder, all of the plugins are in the folder.

------------------------------

```
:version
NVIM v0.5.0
Build type: RelWithDebInfo
LuaJIT 2.1.0-beta3
Compilation: C:/Program Files (x86)/Microsoft Visual Studio/2017/Enterprise/VC/Tools/MSVC/14.16.27023/bin/Hostx86/x64/cl.exe /DWIN32 /D_WINDOWS /W3 -DNVIM_TS_HAS_SET_MATCH_LIMIT /MD /Zi /O2 /Ob1 /DNDEBUG /W3 -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_DEPRECATE -DWIN32 -D_WIN32_WINNT=0x0600 -DINCLUDE_GENERATED_DECLARATIONS -DNVIM_MSGPACK_HAS_FLOAT32 -DNVIM_UNIBI_HAS_VAR_FROM -DMIN_LOG_LEVEL=3 -ID:/a/neovim/neovim/build/config -ID:/a/neovim/neovim/src -ID:/a/neovim/neovim/nvim-deps/usr/include -ID:/a/neovim/neovim/build/src/nvim/auto -ID:/a/neovim/neovim/build/include
Compiled by runneradmin@fv-az152-786

Features: -acl +iconv +tui
See ":help feature-compile"

system vimrc file: "$VIM\sysinit.vim"
fall-back for $VIM: "C:/Program Files/nvim/share/nvim"
```

- Type:
- [X] Bug
- [ ] Enhancement
- [ ] Feature Request
- [ ] Question
- OS:
- [ ] All/Other
- [ ] Linux
- [ ] OS X
- [X] Windows
- Vim:
- [X] Terminal Vim
- [ ] GVim
- [X] Neovim