Hello,
If you are getting "500 Internal Server Error" while accessing your domain and you have no idea how to resolve this issue. In this case, this will help you to fix this issue. Please follow these steps to enable Detailed Errors from WebsitePanel.
1) Click Websites.
2) Select the domain that you are experiencing the error on.
3) Click the Errors tab.
4) Check the IIS, ASP.NET and ASP boxes.
5) Click Update.
Now, try to access your domain again, you will now receive a much more helpful error page.
Thank you,