newburns
I suspect you have been making lots of manual changes to your server (based on your frequent recent posts) and probably stuffed a few things up. Some of those changes sound quite inappropriate and are not the way it is done in sme server. You should not need to be changing file permissions etc, except in specific circumstances. You seem to be using the approach as a hit or miss troubleshooting technique.
I personally am not going to troubleshoot your system, although I have been offering you specific advice where I can.
I suggest you get a test box and install a fresh unmodified sme8beta4 OS, then yum update to sme8beta5, then one contrib at a time, install and test to see if each one works. Nearly any old server will do for testing, the worst thing that can happen is it runs slowly.
That way you will sort out whether there is a problem with the contrib or if there is a problem with how you have modified or configured your server.
Learning on a production system or even a system meant for production, is not a good idea. It's better to sort out all the issues on a test system, and then install correctly to a production system.