This is a known problem in openSUSE Tumbleweed (https://bugzilla.opensuse.org/show_bug.cgi?id=1236026). I do not know exactly why. I have compiled the source code using Qt6 in openSUSE tumbleweed and sqlitebrowser is running well.

As referenced in the linked report and as a quick search inside the issues shows, this is a known problem, although being related to wrong dependencies being pulled in: #3829 As for openSUSE, this mostly is an issue with downstream packaging.

The error was reintroduced to tumbleweed a couple of days back.

The reason: the maintainer of qhexedit2, which is used as a dependency, has dropped the patch revive-qt5.patch (see change notes https://build.opensuse.org/package/revisions/X11:Utilities/qhexedit2). This package is built against Qt6 now, while the official package of sqlitebrowser is still on Qt5

As this back and forth was annoying me a bit I created a fixed package here https://build.opensuse.org/package/show/home%3Azipat%3Abranches%3Asqlitebrowser/sqlitebrowser

If you don't want to compile it yourself, you can use my branch on tumbleweed, I will maintain this until the official sqlitebrowser package is built against Qt6 as well.

zypper ar -f https://download.opensuse.org/repositories/home:/zipat:/branches:/sqlitebrowser/openSUSE_Tumbleweed/ zipat:branches:sqlitebrowser
zypper up sqlitebrowser