Power Steering dead "No Communication"

[Vuk1987]

Hello,
I have a problem with my C4 Picasso 2010 1.6 HDI VIN VF7**************[VIN obfuscated, can be read by forum staff] .
Alternator died in Thursday, and simultaneously wife reported that power steering died also. I taught that maybe car turned it off in order to save the battery, but when I fixed the alternator (which took me a few days) the problem was still there. In diagbox, there is a red written "Power Steering - No Communication" and it's not clickable. I also got an error U1324 "absence of Communication with pneumatic suspension ECU" which I think it's weird because I think I don't have a pneumatic suspension so I think it might be indicating a bigger problem.
The thing is that I plan to travel with this car this weekend, so it's pretty urgent for me to fix it.
Thanks in advance

[Vuk1987]

I'm an idiot, and I apologise to the community.
I havent tightened the nuts, on whatever electronic piece above battery, properly. Now that I have, everything works.
Greetings to all

[xantia_v6]

Well done on finding it! I doubt that we could have been much help on that one.