This solution worked for me…. you have to declare the template name on a dedicated row.
The firts lines of php pages from the theme folder that you loaded
I mean
Home/wp-content/themes/YOURTHEME
From:
<?php /* Template Name: Enquire / ?>
To:
<?php
/* Template Name: Enquire */
?>
i changed from the theme that works in this way and came back normally.
whatch out the empty spaces after the php an before of ?>