Thread:Project:Support desk/Cannot upload Image/reply (5)

Try disabling SELinux to see if SELinux is the problem. If this solves the problem, either keep SELinux disabled or configure it properly.

Also, you could also setup a debug log to see exactly what physical directory is trying to create (instead of a nonsensical mwstore://local-backend/local-public) to check if this is the expected location of your images folder or you mistyped something.