Backlinking the issue on another forum with workaround that worked for me (disabling Qt) https://forum.artixlinux.org/index.php/topic,5847.0.html

issue persists with 102.0.4880.70

@vbnvbn Not sure why, but I didn't think about installing an older version. Really works, Thanks for saving me.

For others, you can download an older working version from https://get.opera.com/ftp/pub/opera/desktop/101.0.4843.58/linux/
Or pick your favorite version here: https://get.opera.com/ftp/pub/opera/desktop/

@vbnvbn I have a similar setup, Lubuntu with new updates. Maybe it is connected to some used libraries. Please post a version of your GLib package (libglib<something> and gir) as the error is connected to the technology used in those packages. Might help the devs to find some incompatibility.

$ uname -a
Linux ### 6.4.8-060408-generic #202308041557 SMP PREEMPT_DYNAMIC Fri Aug 4 16:03:00 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

opera-stable 102.0.4880.33
opera-beta 102.0.4880.10
opera-developer 103.0.4899.0

libglib2.0-dev 2.74.3-0ubuntu1.2
gir1.2-glib-2.0 1.74.0-2