I'm using the basic 3x2 stock panels, and yes, I've got Kopernicus and OPM installed. I'm also taking Kerbalism of CKAN, which was 3.17, although I'm just seeing that there is a newer one, so I'm installing that right now and trying again
Edit: Alright, Kerbalism 3.19 and the problem persists. Another thing which also appeared before and I forgot to mention is that if I return to the KSC, the probes battery runs out and I return to it the SAS doesn't work anymore, even though the batteries start recharging the second I load in