Thread:Project:Support desk/'Could not create directory "mwstore://local-backend/local-public".' on file upload/reply

You should comment out those added lines and enable the debug log to see what location in your server is local-backend/local-public, in case you mispelled something in the configuration files, and also see what steps are being performed and when it fails.

Problems are usually permissions, upload directory under a symlink, or SELinux not allowing the creation of some directories.