This is what the error message says :

```
Warning: require(./wp-blog-header.php): failed to open stream: No such file or directory in /home/newapropos/public_html/index.php on line 17

Fatal error: require(): Failed opening required './wp-blog-header.php' (include_path='.:/opt/alt/php73/usr/share/pear') in /home/newapropos/public_html/index.php on line 17

```

but I don't know what to change in the line 17 to fix?