xnau update errors

I am having an issue with your updater. Now it can’t tell what the real problem is however the error messages point to xnau updater. (See below).

The only plugins we use are the Participants Database and the “Participants Database Permalinks”.

Do I need to use xnau updater if these are the only two plugins we use.
Please refer to the error below.
Thank you very much.

Warning: require(/homepages/30/d675076399/htdocs/W4OVH_11321_john/wp-content
/plugins/xnau-plugin-updates/vendor/composer/../yahnis-elsts/plugin-update-checker
/load-v4p13.php): Failed to open stream: No such file or directory in /homepages
/30/d675076399/htdocs/W4OVH_11321_john/wp-content/plugins/xnau-pluginupdates/
vendor/composer/autoload_real.php on line 78
Fatal error: Uncaught Error: Failed opening required '/homepages/30/d675076399/htdocs
/W4OVH_11321_john/wp-content/plugins/xnau-plugin-updates/vendor/composer/../yahniselsts/
plugin-update-checker/load-v4p13.php' (include_path='.:/usr/lib/php8.0') in
/homepages/30/d675076399/htdocs/W4OVH_11321_john/wp-content/plugins/xnau-pluginupdates/
vendor/composer/autoload_real.php:78 Stack trace: #0 /homepages
/30/d675076399/htdocs/W4OVH_11321_john/wp-content/plugins/xnau-plugin-updates
/vendor/composer/autoload_real.php(61):
composerRequirea2b184e93c3b39e0d9d38595f08736dc() #1 /homepages/30/d675076399
/htdocs/W4OVH_11321_john/wp-content/plugins/xnau-plugin-updates/vendor
/autoload.php(25):
ComposerAutoloaderInita2b184e93c3b39e0d9d38595f08736dc::getLoader() #2 /homepages
/30/d675076399/htdocs/W4OVH_11321_john/wp-content/plugins/xnau-plugin-updates
/xnau-plugin-updates.php(48): require_once('/homepages/30/d…') #3 /homepages
/30/d675076399/htdocs/W4OVH_11321_john/wp-content/plugins/pdb-permalinks
/pdb_permalinks/Plugin.php(388): xnau_plugin_updates::setup() #4 /homepages
/30/d675076399/htdocs/W4OVH_11321_john/wp-content/plugins/participants-database
/classes/PDb_Aux_Plugin.php(162): pdb_permalinks\Plugin->setup_updates() #5
/homepages/30/d675076399/htdocs/W4OVH_11321_john/wp-includes/class-wphook.
php(308): PDb_Aux_Plugin->{closure}() #6 /homepages/30/d675076399/htdocs
/W4OVH_11321_john/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters() #7
/homepages/30/d675076399/htdocs/W4OVH_11321_john/wp-includes/plugin.php(517):
WP_Hook->do_action() #8 /homepages/30/d675076399/htdocs/W4OVH_11321_john/wpsettings.
php(623): do_action() #9 /homepages/30/d675076399/htdocs/W4OVH_11321_john
/wp-config.php(80): require_once('/homepages/30/d…') #10 /homepages/30/d675076399
/htdocs/W4OVH_11321_john/wp-load.php(50): require_once('/homepages/30/d…') #11
/homepages/30/d675076399/htdocs/W4OVH_11321_john/wp-admin/admin.php(34):
require_once('/homepages/30/d…') #12 {main} thrown in /homepages/30/d675076399
/htdocs/W4OVH_11321_john/wp-content/plugins/

The page I need help with: [log in to see the link]