Exception printing is disabled by default for security reasons.

Exception printing is disabled by default for security reasons.

Error log record number: ******

Mostly for magento sites you face this error. 

In this case you need to check following steps.

Go to folder /errors/

Change local.xml.sample to local.xml

After this change you can see few more errors.

Then Open magento/lib/Zend/Cache/Backend/File.php  and search

protected $_options = array(
'cache_dir' => 'null',

and Change it to:

protected $_options = array(
'cache_dir' => 'tmp/',

Save the changes.

create tmp folder under root magento folder.

This should fix the issue.