Magento exception printing is disabled by default for security reasons – How to fix?

As a Magento developer, we need to know common Magento 1.x and Magento 2.x error, how to debug, how to fix the error. In this tutorial for beginner, we will guide you how to debug and solution to fix one of the most common error in Magento 1.x and Magento 2: “There has been an error processing your request, Exception printing is disabled by default for security reasons

Quick Navigation

  • Solution for Magento 1.x
  • Solution for Magento 2.x

Causes

Why we see this error message?: When working with Magento, usually you will see the message (normally you will see this when installing Magento, installing new theme/extensions). This is generally caused by conflict in themes, extensions or database/resource shortage…

Solutions for Magento 1.x

Now, I will provide several solutions to this errors, you can try every or all solution until you can fix your issue.

1. Delete/rename cache folder

Do this first, 90% you will get the error fixed.

First, go to root folder var/cache

Now you can rename or just remove all cache files, and refresh your Magento site to see if the error is gone.

 

2. Check error log record

As you can see the error message: Error log record number: xxxxxxxxxx, here xxxxxxxxxx is the name of log file we need to check. All error log files are located in Magento/var/report folder, just open file manager and go to that folder and find the corresponding file and read the log to find solution.

3. Enable printing errors

If the solution above doesn’t help, you can enable printing errors to check what problems caused the error. To do this follows these steps:

Step 1: go to folder Magento/errors

There you will see local.xml.sample   file, just rename it to  local.xml , the purpose of this action is to enable error printing in Magento

Step 2: Reload the error page and you will see the full list of error message, this will help you fix the issue

4. Enable Magento exception printing 

We can also enable Magento exception printing to get more details report on the error. To do this,

Step 1: in admin panel of Magento go to System > Configuration > Developer > Log Settings. Now change Log Setting to “Yes”

Step 2: You can find system.log and exception.log in Magento/var/log. As per my experience, you will see the following error in exception.log

Now we need to specify a cache_dir for Magento, go to the file /lib/Zend/Cache/Backend/File.php, find:

change it to;

Next, go to Magento root folder and create: /tmp folder

Finally, refresh the page to see if the issue is fixed.

For Magento 2

You may also see this error in Magento 2, just like Magento 1, we will need to enable exception printing in Magento 2. The local.xml file in Magento 2 is located in pub/errors/, now we will rename  local.xml.sample     to  local.xml 

Now reload your error page to see debug messages on the page rather than just  exception printing is  disabled by default for security reasons , something like this

Now you will see what you need to do next, normally we will have to clear Magento cache as in Magento 1, in some case you will need to repair corrupted table in your Magento 2 Databse, that depends on the error logs you see.

 

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