After 11.3.0 20191109 upgrade on receiver every command is met with ER122.

[AndyPanda]

At first I was not able to update some data sources and now the majority of systems are showing as inactive, which that was never the case before the upgrade.  Any idea how to fix this? 

[lratcliffe]

Have you both rekeyed the device and written out cluster settings following the upgrade?  These steps are commonly missed but are necessary in each SIEM 11 upgrade to ensure connectivity is fully functioning.

Assuming that's been done then this is not expected behaviour and I recommend raising a service request so you can send Support the logs from your receivers - we'll need to see what command is being run on the systems so we can understand why they are failing and help resolve it.