UrBackup clients/server can't reach each other

Hello,

I am running TrueNAS-24.10.2.2. I have installed the official urbackup app using the default configuration. After configuring an admin user and putting the site behind a reverse proxy, I follow the steps to add a client, which involves creating a custom executable for the machine. When installing the executable, the client never shows as online and no backup begins. Has anyone had luck getting urbackup to run on truenas scale?