Major template issues

I have registered and downloaded the News II template have been having several different issues. Now my site work even load with the template selected, but it loads with other templates

1. I noticed that the site crashes and gives and SQL error if you choose Joomla categories in News Pro GK 4 or or other components, and there is an empty category. I would think it should just ignore the empty categories and load the other available articles. I skipped that by carefully choosing only categories that have contents but I think it is a bug and should be fixed

2. My site is now showing an error as below and will not load:

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, [email protected] and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Apache/2.2.24 (Unix) mod_ssl/2.2.24 OpenSSL/1.0.0-fips mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 Server at www.ngrguardiannews2.com Port 80

I have even tried to disable the last modules I put up before I got this error but nothing has worked. It is really frustrating. I need help please as I have a deadline. It works fine if I swithc to another template.

Regarding no2,

If your website is working with other templates and not our template then you can delete the our template folder and then re-upload it to make sure there are no file permission issues.

Also see your php error logs to see if there is a log there.

Let us know and we will check further.