Did you extract the zip locally and upload the files via FTP?
Or did you upload the ZIP file and then extract it on the server?
it sounds like some files have only partially uploaded, ive had this before.
If you have CPANELX, upload the ZIP to your public_html and then use the cpanel file manager to locate the file, right click it and extract it, this is the safest bet.
There are a few other ways to extract a zip file on the server, you could upload the ZIP and create a PHP file with the following example...
<?php
$zip = new ZipArchive;
$res = $zip->open(’my_zip_file.zip’);
if ($res === TRUE) {
$zip->extractTo(’my_extract_to_dir/’);
$zip->close();
echo ‘ok’;
} else {
echo ‘failed’;
}
?>
Adam.