Backup recovery problem

good evening guys! So following this guide:
I backed up the data ... but when I go to copy the two folders (date and config) to a new debian installation, when the ip / owncloud address opens, the page remains blank ... does not load the Cloud, I loaded the two folders following the guide, copied the database and configured the config.php file with the new ip address ... in the current installation I opted for the separation of patition / home, so the date folder is located In: / home / username (in config I also set this variant)

For blank pages have a look at your webservers logfiles (there are a few FAQs available about that in the FAQ category) which might help you to understand your problem.

The problem is that in the FAQ I did not find anything ...

See the following FAQ. This contains the info how you can research and see why you're facing this issue.