Fixing the "Warning: Zend Opcache API Is Restricted by..." Error Message

Overview

When responding to tickets, you may get the error "Warning: Zend Opcache API Is Restricted by...". This article provides information on how to fix this issue.

 

Prerequisite

• Access to the Kayako Classic Admin control panel.
• Access to the PHP Admin console.
• Access to the server files.

 

Solution

This error is related to Zend OPCache API access being restricted and is caused by a custom configuration in the php.ini file for OPCache.

Following the PHP documentation, you need to edit the OPCache setting in your php.ini file to set the value to blank:

opcache.restrict_api=""

 

NOTES:

• After you've set the value to blank as mentioned above, make sure to restart the web services.
• You can verify the OPCache setting in the admin control panel by navigating to Admin CP > Diagnostic > PHP Info.
  

If the problem persists, verify if the permissions for the below folders are set up correctly. The helpdesk needs write permissions, recursively, for these directories:

• __swift/files
• __swift/cache
• __swift/geoip
• __swift/logs
• __swift/library
• __apps

For more details, please refer to Setting folder permissions. The article provides information on the permissions based on Unix-based servers or Windows-based servers.