I confirm this bug on sid. For the time being, I managed to restore kile functionality by manually downgrading okular to 23.08.1-2+b2 from testing.
I did that by manually downloading and installing the following 4 packages: libkf5pty5_5.115.0-2+b1_amd64.deb libkf5pty-data_5.115.0-2_all.deb libokular5core11_23.08.1-2+b2_amd64.deb okular_23.08.1-2+b2_amd64.deb and purging okular-data and okular-doc, so the downgraded okular can be configured. -- System Information: Debian Release: trixie/sid APT prefers unstable APT policy: (500, 'unstable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 6.12.8-amd64 (SMP w/8 CPU threads; PREEMPT) Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE Locale: LANG=el_GR.UTF-8, LC_CTYPE=el_GR.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages kile depends on: ii kinit 5.115.0-2 ii kio 5.115.0-9 ii konsole-kpart 4:24.12.0-1 ii libc6 2.40-5 ii libgcc-s1 14.2.0-12 ii libkf5codecs5 5.115.0-2+b1 ii libkf5completion5 5.115.0-2+b1 ii libkf5configcore5 5.115.0-2+b1 ii libkf5configgui5 5.115.0-2+b1 ii libkf5configwidgets5 5.115.0-2+b1 ii libkf5coreaddons5 5.115.0-2+b1 ii libkf5crash5 5.115.0-2+b1 ii libkf5dbusaddons5 5.115.0-2+b1 ii libkf5guiaddons5 5.115.0-4 ii libkf5i18n5 5.115.1-2+b3 ii libkf5iconthemes5 5.115.0-2+b3 ii libkf5jobwidgets5 5.115.0-2+b1 ii libkf5khtml5 5.115.0-2+b1 ii libkf5kiocore5 5.115.0-9 ii libkf5kiofilewidgets5 5.115.0-9 ii libkf5kiowidgets5 5.115.0-9 ii libkf5parts5 5.115.0-2+b1 ii libkf5service-bin 5.115.0-2+b1 ii libkf5service5 5.115.0-2+b1 ii libkf5texteditor5 5.115.0-3+b1 ii libkf5textwidgets5 5.115.0-2+b1 ii libkf5widgetsaddons5 5.115.0-2+b1 ii libkf5windowsystem5 5.115.0-2+b1 ii libkf5xmlgui5 5.115.0-2+b3 ii libpoppler-qt5-1t64 [libpoppler-qt5-1] 24.08.0-4 ii libqt5core5t64 [libqt5core5a] 5.15.15+dfsg-2 ii libqt5dbus5t64 [libqt5dbus5] 5.15.15+dfsg-2 ii libqt5gui5t64 [libqt5gui5] 5.15.15+dfsg-2 ii libqt5script5 5.15.15+dfsg-2 ii libqt5widgets5t64 [libqt5widgets5] 5.15.15+dfsg-2 ii libqt5xml5t64 [libqt5xml5] 5.15.15+dfsg-2 ii libstdc++6 14.2.0-12 hi okular 4:23.08.1-2+b2 ii perl 5.40.0-8 ii texlive-latex-base 2024.20241115-1 Versions of packages kile recommends: ii dvipng 1.15-1.1+b2 ii ghostscript 10.04.0~dfsg-2+b1 ii imagemagick 8:7.1.1.43+dfsg1-1 ii imagemagick-7.q16 [imagemagick] 8:7.1.1.43+dfsg1-1 ii psutils 1.17.dfsg-5 ii texlive 2024.20241115-1 Versions of packages kile suggests: ii aspell 0.60.8.1-3 pn asymptote <none> pn context <none> pn dblatex <none> pn kbibtex <none> ii kile-doc 4:2.9.93-2 pn kile-l10n <none> pn latex2html <none> pn lilypond <none>