Hello, I need help. I wrote in a field relating k2 panel to display on the page and can not remember where to eliminate and correct the error.

I searched where I think you can put it, but I get nothing.
Where should I look?
I am very grateful I can help, :( Now page is not displayed.

Error: 500 Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator to inform of the time the error occurred and of anything you might have done that may have caused the error.

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

You have to enable error reporting from the Global Configuration settings.

This will print the error and which file you need to edit.