500 Error when after login

I got past the login screen. Then I get a 500 error.

site cake log contents:
[2018-08-28 00:20:29] app.INFO: Matched route “{route}”. {“route”:“GET_”,“route_parameters”:{"_controller":"[object] (Closure: {})",“route":"GET”},“request_uri”:“http://vacationrentals.realestatetopsail.com/sitecake.php/",“method”:"GET”} []

Running PHP 5.6