I just updated the Kemper Rack Firmware to Release 188.8.131.5224 and the Rig Manager to Version 184.108.40.20614.
Since I did this, Rig Manager does not connect to the Kemper. It does not show my performances and the Kemper does not show the "performance syncing" dialogue, which it used to show when connected to Rig Manager.
Is this a known issue? What do I do?