P.S. Just recognized, that there is an KeePassXC-2.6.6 available for openSUSE-15.4 in the OSS repo. This version works fine. (no crash) WORKAROUND: sudo zypper install keepassxc-2.6.6-bp154.2.58 The KeePassXC-2.7.1 for openSUSE-15.4 comes from the Backports repo. So this is a bug regarding openSUSE-15.4 backports! KeePassXC-2.6.6 in openSUSE-15.4 OSS repo: https://build.opensuse.org/package/show/openSUSE:Backports:SLE-15-SP4/keepassxc KeePassXC-2.7.1 in openSUSE-15.4 Backports repo: https://build.opensuse.org/package/show/openSUSE:Backports:SLE-15-SP4:Update/keepassxc.17498