We have recently installed Parrot with Upfront on our system running centos 6.7, PHP 5.4.45, and Apache v3.28.3 I have been reading all I can about fixing this Mod Sec 406 Ajax error and I cannot for the life of me figure out how to make this work.
I have tried multiple fixes based on the forums. I have modified my .htaccess record to include;
SecRuleRemoveById 300015 3000016 3000017
As well as the rules most often recommended by your team
And my wp-config.php file to include;
define( 'WP_MEMORY_LIMIT', '256M' );
And I have toggled developer mode to no avial.
I have disabled all plugins included WPMU Defender as I thought that might have been throwing the BLIND SQL Injection Error and halting the process.
I have also written a custom Mod_Sec Tool Rule to prevent the 406 Error from being caught and it even stopped showing up in the Developer Tools Console, but was still unable to save changes made in Upfront.
I have given access in the dashboard so you can poke around. I can provide ssh/ftp login upon request.
Looking for a quick fix here guys. I love what you are doing and want to work with you to make this happen quickly.