This bug was reported by @cheetalope at wordpress.org: https://wordpress.org/support/topic/theme-update-issues
Sinse version 2.0.0, I have moved the template-parts files to /template-parts folder and forgot to update the full-width.php file So everyone who already updated to version 2.0.0 or newer please apply this fix or all your Full-Width pages will not show any content... This is Critical if you are using the Full-Width template. Most people will set the Contact, About & Privacy pages to Full-Width so please check them first.
To fix the issue, you only need to open full-width.php file with a code editor and replace this line of code (line 16) from:
and Save. That's it!