How to update KNS items like plasmoids and themes

Before the plasma Discover store i used to update all my plasmoids and other kns stuff through discover, howver with the introduction of bazzar ( which i do perfer for flatpaks) discover was removed I tried overlaying discover back ont the system with
rpm-ostree install plasma-discover plasma-discover-kns plasma-discover-notifier

and i get the following error when i try to launch discover

plasma-discover
IFFChunk::innerFromDevice: unkwnown chunk "\x89PNG"
org.kde.plasma.libdiscover: OdrsReviewsBackend: Fetch ratings: false
adding empty sources model QStandardItemModel(0x55e3edee67d0)
org.kde.plasma.libdiscover: Discarding invalid backend "packagekit-backend"
fish: Job 1, 'plasma-discover' terminated by signal SIGSEGV (Address boundary error)


I tried installing the packagekit backend to see if it would help with

rpm-ostree install plasma-discover-packagekit

and it said i already had it.

are there any other alternate ways of updating kns stuff other then the get new whateveritem menu (which doesnt always work i found discover to be more reliablie for updating and browing kns stuff) ?
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