After the last update, this morning, kmail no longer starts. $ kmail kmail: symbol lookup error: /lib64/libQt5WebEngineCore.so.5: undefined symbol: _ZN3re23RE23Arg9parse_intEPKciPv What is strange is that today's update seems innocuous (famous last words, I know :-) ): Packages Altered: Upgrade LibRaw-0.19.4-1.fc30.x86_64 @updates-testing Upgraded LibRaw-0.19.2-3.fc30.x86_64 @@System Upgrade dbusmenu-qt-0.9.3-0.21.20160218.fc30.x86_64 @updates-testing Upgraded dbusmenu-qt-0.9.3-0.20.20160218.fc30.x86_64 @@System Upgrade dbusmenu-qt5-0.9.3-0.21.20160218.fc30.x86_64 @updates-testing Upgraded dbusmenu-qt5-0.9.3-0.20.20160218.fc30.x86_64 @@System Upgrade libmodulemd1-1.8.15-3.fc30.1.x86_64 @updates-testing Upgraded libmodulemd1-1.8.15-3.fc30.x86_64 @@System Upgrade oldstandard-sfd-fonts-2.0.2-26.fc30.noarch @updates-testing Upgraded oldstandard-sfd-fonts-2.0.2-24.fc30.noarch @@System Upgrade python3-libmodulemd1-1.8.15-3.fc30.1.x86_64 @updates-testing Upgraded python3-libmodulemd1-1.8.15-3.fc30.x86_64 @@System Upgrade re2-20190801-1.fc30.x86_64 @updates-testing Upgraded re2-20160401-8.fc30.x86_64 @@System Upgrade spirv-tools-libs-2019.4-0.1.20190715.gitaa9e8f5.fc30.x86_64 @updates-testing Upgraded spirv-tools-libs-2019.1-1.fc30.x86_64 @@System Upgrade vulkan-loader-1.1.114.0-1.fc30.x86_64 @updates-testing Upgraded vulkan-loader-1.1.97.0-0.fc30.x86_64 @@System So from here only dbusmenu-qt and dbusmenu-qt5 seem related to qt/kde. Best regards, -- José Abílio