Hello,
You did not give access to WP installation for our FTP user. Now we can see the only empty directory http://prntscr.com/ng3on1
Please enable WP debug mode https://codex.wordpress.org/WP_DEBUG to find out what error appears on your site, it will point in the right direction what needs to be fixed.
Also, update the XStore theme to the latest version (5.2) via FTP – https://www.8theme.com/documentation/xstore/theme-installation/theme-update/
Let us know results and verify the destination folder for FTP user.
Regards