This fix is a real fix for an issue with the SCLogin module when 2 factor authentication is enabled. It has nothing to do with Autotune.I use Admintools. I have turned it off to no avail and have added 'Allow direct access to these files' - 'modules/mod_sclogin/ajax/otpcheck.php' to my htaccess file.
I'm unsure what this code is for.I then tried a temporary work around and added the following to my htaccess.
<IfModule mod_security.c>
SecFilterEngine Off
SecFilterScanPOST Off
</IfModule>
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