Error Load Demo Content

Hello,

I get an error loading data content.

Just to know i set all the php.ini files like this :
safe_mode=false;
upload_max_filesize=64M;
post_max_size=64M;
memory_limit=128M;
extension_dir=/usr/lib/php7.0/extensions;
zend_extension=/usr/lib/php7.0/extensions/opcache.so;
opcache.enable=1;
opcache.memory_consumption=32;
opcache.interned_strings_buffer=8;
opcache.max_accelerated_files=3000;
opcache.revalidate_freq=180;
opcache.fast_shutdown=0;
opcache.enable_cli=0;
opcache.revalidate_path=0;
opcache.validate_timestamps=2;
opcache.max_file_size=0;
opcache.file_cache=/kunden/homepages/11/d780142906/htdocs/.opcache;
opcache.file_cache_only=1;

Here is the error :

undefined
Error load data from the file ‘/default/users.txt’. Please, try again!

Error load data from the file ‘/default/theme_mods.txt’. Please, try again!

Error load data from the file ‘/default/theme_options.txt’. Please, try again!

Error load data from the file ‘/default/widgets.txt’. Please, try again!

Error load data from the file ‘/default/uploads.txt’. Please, try again!

Thank you