I sent you an email with all the info requested.
https://tzportfolio.cloudaccess.host/
Hello,
I checked your website. Your website is using OSMap free version which is support Joomla Content only. If you want to create sitemap for non-core Joomla extension you have to upgrade to Pro.
If you would like to purchase a Pro Sitemap Joomla Extension. I suggest using JSitemap Pro. I am using it for my website with TZ Portfolio and it's working great!.
Please let me know if you need further assistant.
Best Regards,
Sonny