Parse error: syntax error, unexpected 'endwhile' (T_ENDWHILE)

Can you post the contents of page.php to Pastebin and post the link here?

https://pastebin.com/XiXcxqMz

You open an if block on line 32:

<?php if (is_page('about-us') ): //page 1 ?>

but I don’t see your endif anywhere.

Indeed, I removed the entire background image conditions and it fixed it so the pages work now.

Interestingly, the background image conditions still work. ??

Thanks for the help, Stephen.