Got this verbose report in level 4 just after opening tagbar.vim and try toggle tagbar.
sourcing "D:\Logiciels\Vim\vimfiles\plugged\tagbar\autoload\tagbar.vim"
filetype detection:ON plugin:ON indent:ON
finished sourcing D:\Logiciels\Vim\vimfiles\plugged\tagbar\autoload\tagbar.vim
line 1: sourcing "D:\Logiciels\Vim\vimfiles\plugged\tagbar\autoload\tagbar\debug.vim"
finished sourcing D:\Logiciels\Vim\vimfiles\plugged\tagbar\autoload\tagbar\debug.vim
continuing in <SNR>148_ToggleWindow
Tagbar: Ctags doesn't seem to be Exuberant Ctags!
BSD ctags will NOT WORK. Please download Exuberant Ctags from
ctags.sourceforge.net and install it in a directory in your $PATH or set g:tagbar_ctags_bin.
Executed command: "D:\Logiciels\Vim\vim82\ctags.exe --version"
Command output:
Universal Ctags 5.9.0(5d000b1a), Copyright (C) 2015 Universal Ctags Team^M
Universal Ctags is derived from Exuberant Ctags.^M
Exuberant Ctags 5.8, Copyright (C) 1996-2009 Darren Hiebert^M
Compiled: Oct 26 2020, 01:20:04^M
Optional compiled features: +win32, +wildcards, +regex, +internal-sort, +unix-path-separator, +iconv, +option-directory, +xpath, +json, +interactive, +yaml, +case-insensitive-filenames, +packcc^M
Exit code: 1 >> v:shell_error