lab.monkey

Discussion on AUR points to a bug with kde-browser-installation. Others have reported that uninstalling that package fixes the problem. It places the extension /usr/share/chromium/extensions/cimiefiiaegbelhefglklhhakcgmhkai.json I can confirm that removing this file allows Minecraft launcher to boot normally on repeated attempts.

The file apparently allows chromium-based browsers to automatically install the extension. I cannot confirm how removing the file affects kde-browser-integration with other chromium browsers (I am using Firefox), but it evidently doesn’t play well with ML’s built-in browser.

The bug has been reported to KDE (https://bugs.kde.org/show_bug.cgi?id=501866 ) and on this forum at MCL-25003. If you want to check out the AUR discussion: https://aur.archlinux.org/packages/minecraft-launcher

Same issue here. Error logs match what has been supplied. This worked for me a week or two ago, and then it broke, not sure why. Fix that @Jared gives works: remove preferences file and it opens, but that’s a drag. Running Garuda (Arch) on an Intel 6600 with an nVidia 3060 ti gpu, proprietary drivers.