Zend certified PHP/Magento developer

No media folders in storage root

After upgrading to Magento 2.4.3-p3 I can’t view any media folders in the storage root when trying to add an image to a cms page. It just hangs with a spinning’ loading’ icon.
I’ve read the doc here but i’m not sure if this is the fix or where the config.xml is or should be located.
I’m guessing it shouldn’t be in the Magento core code under ‘vendor’?
Any help appreciated.
Andy