[CA] [CA11] Error Message

[Sadey]

I have the following on a NMEA2000 network:
ITC 5
ES128 master with Chirp sounder directly connected/ES127 slave w/latest update
EV 100 autopilot
I70s
Merc Marine Gateway
Fusion MA770

Everything was working fine, with the exception of the occasional wrong water temp on the I70s, until the other day. My I70s will not give depth or temp. When I try to select data sources on either the I70s or ES128 either won’t see the ITC5. When I try to see data sources on my MFD I get the following message...
The following devices are preventing data source selection
ISO (57 6f 6d e7 20 be a0 c0) CAN (105)
Not sure what I’ve done wrong or where to turn.