Hi,
The Nintendo Update Servers (NUS) are still online.
The IOS58 installer expects a IOS58 WAD on your sd card OR internet connection so it can download it from NUS.
Did u do the official update via disc? if yes it is probably an old disc that...
Things I would try:
Verify that the HBC you have is official and newest.
Download iso 58 wad with this, it has a Linux variant:
https://github.com/NinjaCheetah/NUSGet
Install it with something like YAWM, change the default IOS that YAWM uses...
# Issue Report: AHBPROT not enabled / Outdated IOS58 v2
## Summary
All homebrew apps (FCEU Ultra GX, VBA-GX, WiiFlow) show their splash screen for a few seconds, then go to a black screen and return to the Homebrew Channel menu. The d2x cIOS...