Downloaded and installed 8.03. The preinstall page says everything is a-ok. when I go to install I instantly get the error

Request URL:http://c58.hd23324.mine.nu/index.php/install/setup
Request Method:POST
Status Code:500 Internal Server Error
Remote Address:186.137.174.237:80

Yet, nothing is logged to my error log (set to debug mode)

I running linux (arch), succesfully running 5.7.x, with ...

PHP 7.0.14 (cli) (built: Dec 7 2016 17:11:27) ( NTS )
configure with 256M RAM in php.ini

Server version: Apache/2.4.23 (Unix)
Server built: Jul 5 2016 07:34:37

Server version: 10.1.20-MariaDB MariaDB Server