I went and asked about it on koreaders github.
Heres all the info i have atm.
KOReader version:20201.05
Device: Kindle 4 S/N prefix 902317 Model N:d01100
Issue
Tablet gives 2 alternating messages "No default gateway to ping" and "No default gateway to ping" below the name of the network its connected to in wifi info. The internet works when i use the tablets experimental browser and koreaders news downloader feature. But when i try the use the calibre feature(which is part of why i wanted koreader) it gives me a message saying "Do you want to turn on the Wi-Fi?" even though it is connected.
Steps to reproduce
Select "Connect" under Calibre in the koreader menu
crash.log (if applicable)
N/A
####Files used to jailbreak and install koreader
Jailbreaked using
https://wiki.mobileread.com/wiki/Kindle4NTHacking
MKK: "Update_mkk-20141129-k4-ALL_install.bin" from "kindle-mkk-20141129-r18575.tar.xz"
https://www.mobileread.com/forums/sh...d.php?t=225030
KUAL: "KUAL-KDK-1.0.azw2" from "KUAL-v2.7.24-g9f3694a-20200604.tar.xz"
https://www.mobileread.com/forums/sh...d.php?t=225030
Koreader: "koreader-kindle-v2021.05.zip" from
https://github.com/koreader/koreader/releases