Magento Orders->Google Sitemap ... since recently a blank page?

Question

Magento Orders->Google Sitemap ... since recently a blank page?!!!!

Hi since some weeks our sitemap page via Magento Orders->Google Sitemap is empty. Nada! Just a simple white page

This is very frustrating as we dont know how to resolve (and do need to recreate)

And when I click create new, this is the error (create new is the only button we see)

Fatal error: Call to a member function getIdFieldName() on a non-object in /public_html/app/code/core/Mage/Core/Model/Abstract.php on line 151

Where do we start to investigate?

Do I need to clean some table?

And I dont understand why this suddenly is a new error

Answer 1

The problem was a faulty bracket not closing in config.xml