Profile: tony

Problem:
The user was encountering the following PHP notice on his website:
Notice: ob_end_flush(): failed to send buffer of zlib output compression (0)

Solution:
This is not a Toolset error, but rather, a wordpress edge case with the zlib compression configured on the server.
Check this https://stackoverflow.com/questions/38693992/notice-ob-end-flush-failed-to-send-buffer-of-zlib-output-compression-1-in

The user was able to fix it following this article https://www.kevinleary.net/wordpress-ob_end_flush-error-fix/

By adding the following code to theme's functions.php

/**
* Proper ob_end_flush() for all levels
*
* This replaces the WordPress `wp_ob_end_flush_all()` function
* with a replacement that doesn't cause PHP notices.
*/
remove_action( 'shutdown', 'wp_ob_end_flush_all', 1 );
add_action( 'shutdown', function() {
while ( @ob_end_flush() );
} );