Hi Emanuele,
The error comes from the "Shared secret key" that is probably misconfigured.
In 2 places, there should be the same setting:
1) Lucee / Tomcat: open {lucee-root}\conf\server.xml (or {lucee-root}\tomcat\conf\server.xml), and scroll down to the section with <Valve className="mod_cfml.core" ...>
Inside that <Valve> tag, there should be an attribute sharedKey="[some key]"
If it isn't there, add it, and change [some key] to ... some secret key.
Make sure the same [some key] is set in "ModCFMLSecret"
You will also need to set EnableHeaderDataSupport=True
And don't forget to restart the lot :)
Kind regards,
Paul Klinkenberg