I made a change to my forum based on a suggestion made here:
https://xoops.org/modules/newbb/viewtopic.php?topic_id=31844&forum=5

Now my forums have completely disappeared! There's nothing there but a blank page.

When I go into the Forums Admin menu and all my forums are still listed there, so I don't think it deleted my database tables. It just not showing them for some reason.

Can someone please suggest how to get them back? How did updating a module thru the Admin/Module menu screw things up??

Chances are that you editing was flawed in some way.

See this Faq Page to help resolve the blank page problem.

Thank you for the link! I didn't get an error messagr from the Debug Mode but I reuploaded the original Newbb templates, updated again. And now it's back.

Thanks again!