Magento "Exception printing is disabled" error

MASSMEDIUMS01 December 2016

It is common that you may run into a known error in Magento which can occur for a number of reasons, such as when installing extensions or moving the application to a new server: "There has been an error processing your request"

"There has been an error processing your request Exception printing is disabled by default for security reasons. Error log record number: XXXXXXXXXXXXXXX"

Magento install error - Exception printing is disabled.

Here is the solution:

1. Navigate to the "errors" folder.
2. Change local.xml.sample to local.xml
3. You should now see a new list of crazy errors all over the Magento page - this is okay.
4. Open magento/lib/Zend/Cache/Backend/File.php and look for:

   protected $_options = array(
   'cache_dir' => 'null',
   Change it to:
   protected $_options = array(
   'cache_dir' => 'tmp/'

5. Save your changes to File.php
6. Create a tmp folder in the root Magento folder.