i get this error when a page is not found.
Fatal error: Call to a member function isErrorPage() on boolean in C:\tools\xampp\htdocs\kirby\kirby.php on line 367
I did install a custom error.php file in the templates folder. And i even added a blueprint for it. But no luck.
You need to have an error folder within your /content folder, it comes with any kirby starter or plainkit. The error folder must not be deleted, you can rename it but then you must set the new name in your config.php http://getkirby.com/docs/cheatsheet/options/error