Vim error message when opening .ini file

Vim shows the following long error message when I open a file with a dot-ini (.ini) file extension:

Error detected while processing /usr/share/vim/vimrc[25]../usr/share/vim/vim90/syntax/syntax.vim[44]..BufRead Autocommands for "*~"..BufRead Autocommands for "*.ini"..FileType Autocommands for "*"..Syntax Autocommands for "*"..function <SNR>3_SynSet[25]..script /usr/share/vim/vim90/syntax/dosini.vim: line 28: E10: \ should be followed by /, ? or &

Following that "\" on line 28 with any one of "/", "?" or "&" resulted in an even longer error message.

In my .zshenv:

export EDITOR=vim 

export FCEDIT=vim 

export SLANG_EDITOR=vim

Also:

--> vim --version

VIM - Vi IMproved 9.0 (2022 Jun 28, compiled Aug 15 2023 20:47:29) Included patches: 1-1713 Modified by team+vim@tracker.debian.org Compiled by team+vim@tracker.debian.org Huge version without GUI. Features included (+) or not (-): +acl +file_in_path +mouse_urxvt -tag_any_white +arabic +find_in_path +mouse_xterm -tcl +autocmd +float +multi_byte +termguicolors +autochdir +folding +multi_lang +terminal -autoservername -footer -mzscheme +terminfo -balloon_eval +fork() +netbeans_intg +termresponse +balloon_eval_term +gettext +num64 +textobjects -browse -hangul_input +packages +textprop ++builtin_terms +iconv +path_extra +timers +byte_offset +insert_expand -perl +title +channel +ipv6 +persistent_undo -toolbar +cindent +job +popupwin +user_commands -clientserver +jumplist +postscript +vartabs -clipboard +keymap +printer +vertsplit +cmdline_compl +lambda +profile +vim9script +cmdline_hist +langmap -python +viminfo +cmdline_info +libcall +python3 +virtualedit +comments +linebreak +quickfix +visual +conceal +lispindent +reltime +visualextra +cryptv +listcmds +rightleft +vreplace +cscope +localmap -ruby +wildignore +cursorbind -lua +scrollbind +wildmenu +cursorshape +menu +signs +windows +dialog_con +mksession +smartindent +writebackup +diff +modify_fname +sodium -X11 +digraphs +mouse -sound -xfontset -dnd -mouseshape +spell -xim -ebcdic +mouse_dec +startuptime -xpm +emacs_tags +mouse_gpm +statusline -xsmp +eval -mouse_jsbterm -sun_workshop -xterm_clipboard +ex_extra +mouse_netterm +syntax -xterm_save +extra_search +mouse_sgr +tag_binary -farsi -mouse_sysmouse -tag_old_static system vimrc file: "$VIM/vimrc" user vimrc file: "$HOME/.vimrc" 2nd user vimrc file: "~/.vim/vimrc" user exrc file: "$HOME/.exrc" defaults file: "$VIMRUNTIME/defaults.vim" fall-back for $VIM: "/usr/share/vim" Compilation: gcc -c -I. -Iproto -DHAVE_CONFIG_H -Wdate-time -g -O2 -ffile-prefix-map=/build/vim-9Zy3tT/vim-9.0.0749+really.v9.0.1713=. -flto=auto -ffat-lto-objects -flto=auto -ffat-lto-objects -fstack-protector-strong -Wformat -Werror=format-security -D_REENTRANT -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1 Linking: gcc -Wl,-Bsymbolic-functions -flto=auto -ffat-lto-objects -flto=auto -Wl,-z,relro -Wl,-z,now -Wl,--as-needed -o vim -lm -ltinfo -lselinux -lsodium -lacl -lattr -lgpm -L/usr/lib/python3.10/config-3.10-x86_64-linux-gnu -lpython3.10 -lcrypt -ldl -lm -lm```

:set runtimepath? shows:

runtimepath=~/.vim,/var/lib/vim/addons,/etc/vim,/usr/share/vim/vimfiles,/usr/share/vim/vim90/,/usr/share/vim/vimfiles/after,/etc/vim/after,/var/lib/vim/addons/after,~/.vim/after

Also, I have vim-plug the vim plugin manager in ~/.vim/autoload/plug.vim but no plugins installed yet.

How can I get Vim to open .ini files without any error message(s)?

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