UpdraftPlus plugin only works in Playground partially.

Steps to reproduce:

1. Load Playground with the UpdraftPlus plugin installed: https://playground.wordpress.net/?plugin=updraftplus
2. Navigate to WP Admin: /wp-admin/admin.php?page=updraftplus
3. Open the browser console
4. Notice SQL errors:

[18-Apr-2024 08:21:20 UTC] WordPress database error <div style="clear:both">&nbsp;</div>
<div class="queries" style="clear:both;margin-bottom:2px;border:red dotted thin;">
<p>MySQL query:</p>
<p>SELECT @@session.max_allowed_packet</p>
<p>Queries made or created this session were:</p>
<ol>
<li>Executing: BEGIN | (no parameters)</li>
<li>Executing: SELECT @@session.max_allowed_packet | (no parameters)</li>
<li>Executing: ROLLBACK | (no parameters)</li>
</ol>

There is also JS errors displayed Uncaught ReferenceError: updraftlion is not defined in the console. Clicking different buttons triggers more errors like Uncaught ReferenceError: updraft_backup_dialog_open is not defined, but I'm not sure if those are related to the Playground environment or the plugin itself.