Problem:

The Zlib Library is not compiled / enabled in your PHP configuration. This function is required to read our encoded PHP scripts.

Solution:

Please make a request to your server administrator to enable Zlib in your PHP INI.

To check if you have ZLib library enabled, use the phpinfo() function. Or if you already have the One Admin files uploaded to your web server, you can access the URL http://your_domain.com/oneadmin/phpinfo.php with your browser.

For more information on Zlib, kindly refer to our knowledge base article here.