Error Code: 406 - Unknown Error - The full error coming back from Autotune is usually "Not Acceptable! An appropriate representation of the requested resource could not be found on this server. This error was generated by Mod_Security." It seems like mod_security (an Apache firewall addon) is blocking our automated tool from scanning your page. Mod_security, in general, tries to prevent 'bad' requests (malicious, automated, and various other kinds). It may be detecting our tool is automated (not a real browser) and denying it. You'll need to investigate your mod_security logs, or disable it, to let the Autotune tool perform its checks
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