We have a production server running 2.17 and a development server running 2.18. Both are virtual servers. The development server is working great, so to upgrade the production server we made a clone of the development server and replaced the production server with that clone. The courses directory and database from the production server were backup-ed in advance and then restored to the 2.18 version now running on the production server.
But now when I try to log in as admin, I get the message "You are not authorized to create or delete courses".
Any suggestions on how to get this issue resolved? I assume it might be some type of permission issue, but I don't know where to look. One thing I noticed is that when I uncompressed the courses directory (from the previous 2.17 production server), the permissions on courses (and all subdirectories) was shown as drwxrwxr-x, but on the 2.18 development server, the courses directory (and all subdirectories) are shown as drwxrwsr-x (with the "s" instead of "x" in the group section).
I guess I had this (possibly naive) hope that replacing the 2.17 server with a working 2.18 clone would be a quick way to upgrade the production server.