Critical Error in Admin

We tried to contact yu via your website but keep getting a recaptcha error upon form submission. We see a critical error in the admin area when we try to view the waitlist. This is in the debug logs. How do we fix it?

[01-Mar-2023 20:12:42 UTC] PHP Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /var/web/site/public_html/wp-content/plugins/waitlist-woocommerce-premium/admin/templates/xoo-wl-waitlist-table.php:50
Stack trace:

0 /var/web/site/public_html/wp-content/plugins/waitlist-woocommerce-premium/admin/xoo-wl-admin.php(70): include_once()

1 /var/web/site/public_html/wp-includes/class-wp-hook.php(308): xoo_wl_watilist_table_cb('')

2 /var/web/site/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters('', Array)

3 /var/web/site/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array)

4 /var/web/site/public_html/wp-admin/admin.php(259): do_action('wait-list_page_…')

5 {main}

thrown in /var/web/site/public_html/wp-content/plugins/waitlist-woocommerce-premium/admin/templates/xoo-wl-waitlist-table.php on line 50

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