How to solve "Sorry! attempt to access restricted file" Error

To resolve this error check for the following configuration and permissions.

1. Check for User permission: This is the main and most common reason for this error. Thus, first, check for your account’s user permission in Vtiger and make sure you have access to the file you are trying to open. In case of any questions, consult the system administrator.
2. Clear browser cache: Sometimes the problem is just with your browser. If the issue is not resolved by checking the user permissions. Go and clear your browser cache memory in the browser settings. This may solve the problem.
3. Check for configuration issue: If the problem is with the configuration you can resolve it by setting the configuration the following way:

• Go to your vTigerCRM directory
• Open “config.inc.php”.
• Go to line 86 and set the $root_directory value to the correct vTiger directory. The directory must end with /. 

It should look something like this – $root_directory = ‘/var/www/vtigercrm/’; 

4. Contact Vtiger customer support: If the issue still persists there might be a technical error with the Vtiger server. To solve consult the Vtiger support team.