Custom Post Type with Template

I have a problem where a custom post type seems to not be fully registering.

I have created a set of custom post types using CPT UI. Which works. For example I have “route” and “country”. They show up in my admin and work.

To create a template for “route” posts I duplicated the following files into my child theme in the same directory:

1) single.php becomes single-route.php

2) In single-route.php I updated the code from:

<?php x_get_view( x_get_stack(), ‘wp’, ‘single’ ); ?>

to this:

<?php x_get_view( x_get_stack(), ‘wp’, ‘single-route’ ); ?>

3) content.php becomes content-route.php

4) I updated the following code in content-route.php from:

<?php x_get_view( ‘ethos’, ‘_content’, ‘post-header’ ); ?>
to this:

<?php x_get_view( ‘ethos’, ‘_content’, ‘route’, ‘post-header’ ); ?>

4) wp-single.php becomes wp-single-route.php

All of that worked, my new template applied to the “route” custom post type.

Now, a week later, when I repeated that process substituting “country” in place of “route” it does not work for me. The country posts return a 500 error.

I kind of remember that there was another step I had to go through to force the full registration of the new post types. Is there something I am missing?

Thanks for any help you can provide.