SUMMARY The problem and the solution are given in the following bug report https://bugs.kde.org/show_bug.cgi?id=310998 I have tested the solution given in the bug report and it works. To resolve this condition in kde neon, the packages sound-theme-freedesktop and libcanberra-pulse if not a dependency of plasma-pa has to be made a dependency for it. SOFTWARE/OS VERSIONS kde 5.14.90 git stable
https://phabricator.kde.org/D18807 https://packaging.neon.kde.org/kde/plasma-pa.git/commit/?id=51e90659edaa474a3e2587a84efbbd81f816b11a