vim throws error "E700: Unknown function: s:get_mediawiki_syntaxlocal" after upgrading vimwiki via Vim-Plug

[usonianhorizon]

I have just upgraded all my vim plugins on two systems: FreeBSD 13.2 (vim 9.0.1671) and Ubuntu 18.04.6 LTS (vim 8.0.3741)

On both systems, the following error is being thrown upon invoking vim:

Error detected while processing /usr/home/<username>/.vim/plugged/vimwiki/plugin/vimwiki.vim[232]..function vimwiki#vars#init[8]..<SNR>42_populate_wikilocal_options[29]..<SNR>42_normalize_wikilocal_settings[8]..vimwiki#vars#get_syntaxlocal[13]..vimwiki#vars#populate_syntax_vars:
line   21:
E700: Unknown function: s:get_mediawiki_syntaxlocal
E116: Invalid arguments for function extend({}, function('s:get_' . a:syntax . '_syntaxlocal')())
Press ENTER or type command to continue

Here is the output from :VimwikiShowVersion (from FreeBSD 13.2):

Version: 2023.04.04
Os: Linux
Vim: 900
Branch: master
Revision: 71edcf6
Date: 2023-04-04 20:28:34 -0600

I do have one wiki which is set up to use mediawiki syntax:

" If vimwiki is in this list, then VimwikiAll2HTML will generate in local
" directory; else it will be generated in $HOME.
let g:vimwiki_list = [
...
     \{
        \'path': '<path_to_wiki>',
        \'syntax': 'mediawiki'
    \},
\]

If I delete this wiki from the vimwiki_list, the problem goes away. Any help on a mitigation to this issue would be greatly appreciated.

advTHANKSance