I’m having a similar problem with this host (not sure if it’s worth resolving tbh) but:
wp-config file is totally correct, all DB settings are correct, al files are uploaded however, when I try and access ‘mydomain/wp-admin/install.php’ a ‘forbidden’ error occurs, or a link appears in the top left of the page, with the anchor text ‘Enter The Website’.
This link resolves to a 404 page on 000webhost and opens a pop up ad. Not good. Has anyone else seen anything like this?