New page added but URL not found??

I'm not sure what happened. I added created a few custom pages and had them up for months. And this afternoon, I clicked on the page "www.mysite.com/viewPage.php?ID=test" and I now get a 404 error:

Not Found
The requested URL /backroom/profile.php was not found on this server.

?!?!??!?!

If I go to Page Builder. Those pages and all blocks and proper HTML are still there. But I cant view them in a browser??

What happened, they were working fine???

I also tried creating just just a test new page ... And I still get the same error

htaccess sounds like to me is it in the root?  this is a guess....

I double checked and yes, the .htaccess is in the main root folder.

Did any of the other files get deleted by accident. Specifically profile.php or viewpage.php? Or any recent mods that required changes to either of those 2 pages.

Have you checked Permalinks in Admin?

This was the problem.  YAY it works again!

Thanks everyone for the quick replies and help!!

xoxoxo

My mod rewrite is on, and my permalinks is active, but my new pages cannot be found.  What should I do?