GUI not opening after upgrading to 2.26.2-1 on the AUR

[ByteBuccaneer 23]

On Manjaro (Arch), on the AUR the "eddie-ui" package was updated on 2026-08-27 13:13 (UTC). After building this package version 2.26.2-1 (via yay) and rebooting, can no longer open the GUI. Clicking the icon (in KDE) does nothing. Running "eddie-ui" in the CLI produces this error message:

The file /usr/lib/mscorlib.dll is an invalid CIL image

When I left WinBlows I thought I had left DLL Hell for good 🤬

I found this old but similar topic from our resident Tech Jedi Alex and tried "using the force" with 

yay -S --rebuildtree eddie-ui

but to no avail - same error.  Anyone have any troubleshooting advice? From that same post I saw this advice so here's the output from that:

❯ for pkg in `expac -l '\n' '%D' eddie-ui`; do pacman -Qs $pkg|grep local; done
local/mono 6.12.0.206-1
local/mono-msbuild 16.10.1.xamarinxplat.2021.05.26.14.00-5
local/terminus-font 4.49.1-8
local/ttf-fira-code 6.2-4
local/ttf-hack 3.003-7
local/ttf-inconsolata 1:3.000-5
local/curl 8.21.0-1
local/lib32-curl 8.21.0-1
local/networkmanager-openvpn 1.12.5-1
local/networkmanager-vpn-plugin-openvpn 1.12.5-1
local/openvpn 2.7.6-1
local/sudo 1.9.17.p2-6
local/polkit 127-3
local/polkit-kde-agent 6.7.4-1 (plasma)
local/polkit-qt5 0.201.1-1
local/polkit-qt6 0.201.1-1
local/libnotify 0.8.8-1
local/libayatana-appindicator 0.6.0-2

 

[ByteBuccaneer 23]

I have given up on the AUR. I downloaded the precompiled Arch version from the website and ran

sudo pacman -U eddie-ui_2.26.2_linux_x64_arch.tar.zst  

and all is well again.

[Tech Jedi Alex 1569]

Last time this came up:In short, try building that package in a clean chroot.
Usually, it indicates that some package was built against an older version of Mono. CachyOS keeps coming up as the culprit from time to time as it provides a repo with prebuilt AUR packages, some of which are not meant to be distributed like that, but Manjaro is not without its problems, either.