Discover notifies me that there are several themes that can be updated but when I try it gives error. I have ran it in console and this is the output:

$ plasma-discover-update
adding empty sources model QStandardItemModel(0x555adbe8d4c0)
Fwupd Error 10 no metadata URIs for vendor-directory
no component found for "org.archlinux.arch"
ready 4
steady 0
go! UpdateTransaction(0x7fb119dd6930)
status! Transaction::CommittingStatus 4
qt.network.http2: connection error: SETTINGS invalid number of concurrent streams
qt.network.http2: stream 7 finished with error: "SETTINGS invalid number of concurrent streams"
qt.network.http2: stream 5 finished with error: "SETTINGS invalid number of concurrent streams"
qt.network.http2: stream 3 finished with error: "SETTINGS invalid number of concurrent streams"
qt.network.http2: stream 1 finished with error: "SETTINGS invalid number of concurrent streams"
kf.newstuff.core: "SETTINGS invalid number of concurrent streams"
kf.newstuff.core: "Download of \"Candy icons\" failed, error: SETTINGS invalid number of concurrent streams"
KNS error in "Icons" : KNSCore::InstallationError "Download of \"Candy icons\" failed, error: SETTINGS invalid number of concurrent streams" QVariant(Invalid)
kns error "/usr/share/knsrcfiles/icons.knsrc" "Download of \"Candy icons\" failed, error: SETTINGS invalid number of concurrent streams"
kf.newstuff.core: "SETTINGS invalid number of concurrent streams"
kf.newstuff.core: "Download of \"Nordic darker KDE\" failed, error: SETTINGS invalid number of concurrent streams"
KNS error in "Global Themes" : KNSCore::InstallationError "Download of \"Nordic darker KDE\" failed, error: SETTINGS invalid number of concurrent streams" QVariant(Invalid)
kns error "/usr/share/knsrcfiles/lookandfeel.knsrc" "Download of \"Nordic darker KDE\" failed, error: SETTINGS invalid number of concurrent streams"
kf.newstuff.core: "SETTINGS invalid number of concurrent streams"
kf.newstuff.core: "Download of \"Nordic KDE\" failed, error: SETTINGS invalid number of concurrent streams"
KNS error in "Global Themes" : KNSCore::InstallationError "Download of \"Nordic KDE\" failed, error: SETTINGS invalid number of concurrent streams" QVariant(Invalid)
kns error "/usr/share/knsrcfiles/lookandfeel.knsrc" "Download of \"Nordic KDE\" failed, error: SETTINGS invalid number of concurrent streams"
kf.newstuff.core: "SETTINGS invalid number of concurrent streams"
kf.newstuff.core: "Download of \"Nordzy-icon\" failed, error: SETTINGS invalid number of concurrent streams"
KNS error in "Icons" : KNSCore::InstallationError "Download of \"Nordzy-icon\" failed, error: SETTINGS invalid number of concurrent streams" QVariant(Invalid)
kns error "/usr/share/knsrcfiles/icons.knsrc" "Download of \"Nordzy-icon\" failed, error: SETTINGS invalid number of concurrent streams"

SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.25.0
KDE Frameworks Version: 5.95.0
Qt Version: 5.15.4
Kernel Version: 5.18.5-arch1-1 (64-bit)
Graphics Platform: X11
Processors: 64 × AMD Ryzen Threadripper 3970X 32-Core Processor
Memory: 62.6 GiB of RAM
Graphics Processor: AMD Radeon RX 580 Series
Manufacturer: ASUS