Hello, I cannot access the themes.php file - when I click on the link in the admin interface I get the message
"The website encountered an error while retrieving http://mycheapcaribbeanvacations.com/wp-admin/themes.php. It may be down for maintenance or configured incorrectly.
Here are some suggestions:
Reload this webpage later.
HTTP Error 500 (Internal Server Error): An unexpected condition was encountered while the server was attempting to fulfill the request."
In addition, there are issues with the site's layout, probably because there isn't read correctly the css file.
Any suggestion to solve the issue?