I'm trying to deploy a new version of an EE site which has been upgraded to 2.7.2.
Rather than just overwrite the existing system folder, I'm uploading the new one alongside it (with a different name) but when I update
$system_path in admin.php to point to the folder, I get Your system folder path does not appear to be set correctly. If I change it back again, the CP login page loads.
The path/name is definitely correct, I'm just swapping out the name of one for the other and they're both at the same level in the directory structure.
What else could be causing EE to not recognise the new system folder (server is running Windows if that helps)?