Fatal with 6.3.1 Update

Seeing the following fatal with 6.3.1 update:

[29-Sep-2026 14:10:55 UTC] PHP Fatal error:  Uncaught Error: Cannot unset string offsets in /srv/htdocs/wp-content/plugins/weglot/src/actions/front/class-translate-page-weglot.php:554
Stack trace:
#0 /wordpress/core/7.1.2/wp-includes/class-wp-hook.php(353): WeglotWP\Actions\Front\Translate_Page_Weglot->weglot_custom_settings('')
#1 /wordpress/core/7.1.2/wp-includes/class-wp-hook.php(377): WP_Hook->apply_filters(NULL, Array)
#2 /wordpress/core/7.1.2/wp-includes/plugin.php(523): WP_Hook->do_action(Array)
#3 /wordpress/core/7.1.2/wp-includes/general-template.php(3441): do_action('wp_head')
#4 /wordpress/core/7.1.2/wp-includes/template-canvas.php(17): wp_head()
#5 /wordpress/core/7.1.2/wp-includes/template-loader.php(132): include('/wordpress/core...')
#6 /wordpress/core/7.1.2/wp-blog-header.php(19): require_once('/wordpress/core...')
#7 /wordpress/core/7.1.2/index.php(17): require('/wordpress/core...')
#8 {main}
  thrown in /srv/htdocs/wp-content/plugins/weglot/src/actions/front/class-translate-page-weglot.php on line 554