Heya! I had a problem like this until I went and did this;
1.Open the file index.php
2.Look and find the line where it says wp-blog-header.php
3.Chances are, the line that names this file goes like this
require(‘./wordpress/wp-blog-header.php’);
4.Change it to this
require(‘wordpress/wp-blog-header.php’);
In short, delete the ‘./’ right after the (
Save, refresh, see what happens!