https://bugs.kde.org/show_bug.cgi?id=418598
--- Comment #10 from Nick <nick.craig....@gmail.com> --- Although I've now got kdevelop and kmail working after manually installing libqca-qt5-2 from https://origin.archive.neon.kde.org/user/pool/main/q/qca2/libqca-qt5-2-dev_2.1.3-2+18.04+bionic+build2_amd64.deb I still get issues trying to install other programs like okular, i.e sudo apt install okular [sudo] password for nick: Reading package lists... Done Building dependency tree Reading state information... Done Starting pkgProblemResolver with broken count: 1 Starting 2 pkgProblemResolver with broken count: 1 Investigating (0) okular:amd64 < none -> 4:19.12.3-0xneon+18.04+bionic+build53 @rc puN Ib > Broken okular:amd64 Depends on libokular5core9:amd64 < none | 4:19.12.3-0xneon+18.04+bionic+build53 @un uH > (= 4:19.12.3-0xneon+18.04+bionic+build53) Considering libokular5core9:amd64 0 as a solution to okular:amd64 10000 Re-Instated libokular5core9:amd64 Broken okular:amd64 Depends on libqca-qt5-2:amd64 < 2.1.3-2ubuntu2 @ii mK NPb IPb > (>= 2.3.0) Considering libqca-qt5-2:amd64 16 as a solution to okular:amd64 10000 Broken okular:amd64 Depends on libqmobipocket2:amd64 < none | 4:19.12.3-0xneon+18.04+bionic+build31 @un uH > Considering libqmobipocket2:amd64 1 as a solution to okular:amd64 10000 Re-Instated libqmobipocket2:amd64 Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies. okular : Depends: libqca-qt5-2 (>= 2.3.0) but 2.1.3-2ubuntu2 is to be installed E: Unable to correct problems, you have held broken packages. -- You are receiving this mail because: You are watching all bug changes.