Same happened for me, actually during installation of web-installer-url-handler (1.0.2-1) running Linux 5.8.18-1-MANJARO #1 SMP PREEMPT Sun Nov 1 14:10:04 UTC 2020 x86_64 GNU/Linux, i3wm.
Edit: See also in forum thread [Testing Update] 2020-11-17 - KDE Frameworks 5.76, Deepin, Firefox 83.0, AMDVLK 2020.Q4.4.