Sitemap error

Hi,

Thanks for contacting us here about this extension.

I get an error on the 'wpms-sitemap.xml' by google search console "Unbound XML namespace prefix.
how can I fix it?

We got and fixed the bug, the update version will be released soon.
Please drop us a ticket (menu Support > Ticket support). Our developer in charge will help you.

Thanks a lot!
Regards,