500 - Internal Server Error

[pridecentervt]

We recently created a directory on our site via a plug-in and individual listings are coming back with an Internal Server Error - 500. Here's the copy from the error screen:

**If you are the webmaster of this site please log in to Cpanel and check the Error Logs. You will find the exact reason for this error there.

Common reasons for this error are:

Incorrect file/directory permissions: Above 755.
In order files to be processed by the webserver, their permissions have to be equal or below 755. You can update file permissions with a FTP client or through cPanel's File Manager.

Incorrect Apache directives inside .htaccess file.
Make sure you have not specified unsupported directives inside the local .htaccess file. Such include PHP settings and Apache module settings.**

My webmaster was unable to find any errors and said the settings on the cPanel were good. This was confirmed via the support team with my host, Siteground. Any ideas now? I would prefer to not have to switch plug-ins now at this point as it would be a time-consuming venture.