Can't download assignments

Hi
Can't download the students assignments. Encreased the salt keys wpconfig.
Opened up the site for access.
Regards Valentijn

Ps : htacess: ok?
php_value upload_max_filesize 1000M
php_value post_max_size 2000M
php_value memory_limit 1024M
php_value max_execution_time 360
php_value max_input_time 360