Autopilot (FCU) Knobs do not work.

There is a conflicting mod installed.

If your Autopilot knobs on the FCU do not respond to any input and do not turn whatsoever, you have a conflicting mod installed. The Fly-By-Wire A32NX version 0.4.2 and earlier conflict with the Fenix A320. You must update to at least version 0.5.0 or greater to resolve this conflict.