I was just trying to move /core/ folder to a new sub-folder and after performing the steps described in the page
https://docs.modx.com/revolution/2.x/administering-your-site/security/hardening-modx-revolution, section Locking down MODX > Core
I got an error when I was trying to access the Manager page. After some time found that the first file:
core/config/config.inc.php (change the $modx_core_path variable)
is missing one more path to update and it is
$modx_processors_path
Since it refers to /core/ sub-folders and can't find the /core/ in the root, it generates error and bans access to the Manager login page.
p.s. the page suggests updating the database workspaces table but in my case the path here is a sort of variable - {core_path}. Does it still require any change or update installation in version 2.5.7?