The “aborted” message hints at this being some kind of network error. We mainly see this happen on mobile networks although I am not able to reproduce it myself with my mobile provider. I also see that you have used two different WIFI routers, and I assume these are not connected to cellular networks?
Do you have the possibility to try again using a VPN?
I don’t have a VPN, so unfortunately can’t try that.
I have tried with 1) a WIFI router connected to a normal cable phone line. 2) a WIFI router connected to a cellular 4G network. 3) hotspot connection to a different 5G cellular network.
All of them gave me the Zlib header error for the last 3-4 airac cycles.
The only other thing to mention is that I did have the beta software for the navigraph ingame panel before it was released. Not sure of that makes any difference.