v1.18.13 on Kubuntu 23.10: "Error: requestMetadata is not a function" when opening image

[NotizMe]

• Etcher version: v1.18.13
• Operating system and architecture: Kubuntu 23.10 x64
• Image flashed: debian-12.2.0-i386-netinst.iso (https://cdimage.debian.org/debian-cd/current/i386/iso-cd/debian-12.2.0-i386-netinst.iso)
• Reproduction process:

1. Build and install Etcher

git clone git@github.com:balena-io/etcher.git
cd etcher
# Getting .resinci.json, see issue #4136 
git checkout 292f86d6f5b0e8dd34cb3dd6e008517f9a066cd0 .resinci.json
make electron-develop
# Removing gconf dependencies, see issue #4137
sed -i '/gconf/d' electron-builder.yml
sed -i '/gconf/d' docs/USER-DOCUMENTATION.md
sed -i '/gconf/d' scripts/resin/electron/electron-builder.json
make electron-build
sudo apt install ./dist/balena-etcher-electron_1.18.13+e9697359_amd64.deb

2. Open Etcher
3. Pick file

• What do you think should have happened: I can continue
• What happened:
  Message box: Error opening source

Something went wrong while opening /home/pieter/downloads/debian-12.2.0-i386-netinst.iso.

Error: requestMetadata is not a function

• Do you see any meaningful error information in the DevTools? Nothing in the dev console

Extra info

v1.18.12 works perfectly when using the same workarounds for:

• .resinci.json missing, but still needed for make electron-build #4136
• gconf dependencies no longer needed on Kubuntu 23.10 #4137