Ok, everything is clear now. Wordpress, since version 4.5, requires minimum PHP 5.6. If you open your blank site in Firefox html mode (CTRL+U) you see an error related with array_replace_recursive() function. It means your current PHP version is older than 5.6 and doesn’t support necessary Wordpress functions. We recommend you to contact with your admin/hosting provider because your PHP version requires update.
Comments
please send us link to page which is blank so we can have a look on it.