Thank you but I tried installing manually and still received the same error. The instructions on the uploads folder are confusing, I added the line of code into my child theme functions.php file:
add_theme_support( ‘avia_demo_store_downloaded_files’ );
and I tried uploading the xml and text file that I unzipped into:
\uploads\avia_demo_files\medical\
\uploads\avia_demo_files\medical-demo\
\uploads\avia_demo_files\enfold-medical\
all received the same error.
Also, your directions say to extract zip into folder and only mentions xml files. There was one xml file and one text file. At Github it said to “Replace demo php with txt, keep backup” – not sure what this means as I already edited the functions.php per your directions with the one line of code.