The ow_includes folder is set at 755.
Here is the conversation with my host so far:
Host: I have checked this in detail and I am also getting the same error while checking your site on server backend. It seems to be a problem with the scripts. You may contact developer of this script to resolve this. Let me know if they suggest any php variable settings or permissions need to be changed on server side to work this script.
Me: Ok. I just thought it was odd that two different scripts (from two different developers) are coming up with similar errors. After I installed Oxwall, I checked their forum for information about the problem. Didn't find a solution, so I posted a message and am waiting for a response.
In the meantime, I tried changing permissions on the includes/config.php file to 755 and received a 500 Error. I've since changed the permissions back to 400, so the original error is back.
Afterward, just to see if it was possibly something to do with my server, I decided to install Sharetronix...which results in a very similar error.
Host: I see the following error in the error log of your account.
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[15-Jun-2013 15:17:36] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20060613/timezonedb.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20060613/timezonedb.so: cannot open shared object file: No such file or directory in Unknown on line 0
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This error was due to "timezonedb.so" module which was not installed on your server. I have installed it on your server using the command "pecl install timezonedb" and the error went away. But, the main error is still persisting while accessing those of URL's. I would wait for their response and see what they can suggest on this.
I just tried uninstalling and reinstalling Oxwall, but I'm still getting the same error.