Upgrade from CE 1.9.1 to 1.9.2.2 produces "Can't retrieve entity config: admin/permission_block"

Question

I have recently upgraded Magento CE from 1.9.1.1 to 1.9.2.2 and when I goto Admin > System > Permissions > Blocks, I receive an error screen with:

There has been an error processing your request

Can't retrieve entity config: admin/permission_block

How do I resolve this please?

Answer 1

I had this same problem, these steps solved it:

1- Make sure your tmp folder is writable, I had a custom tmp folder set on lib/Zend/Cache/Backend/File.php

'cache_dir' => 'tmp',

2- Remove var/cache and reload the admin page