Gnome | OBS-Studio

I have a fresh installation of Manjaro Gnome Edition and installed OBS-Studio. The User Interface looks totaly Broken. Why is it like that ?

Then i tried to install the snap version of OBS, it looks pretty good. But its not possible to use Droidcam in the Snap version… In Pop Ubuntu, Fedora, it is possible to use Droidcam with OBS Studio Snap Edition. I also granted the permissions available in the Snap store to grant… I need help there. Either the offical Manjaro repo doesnt look broken or i get somehow the Snap version to work (couse of the pre installed plugins)

Broken Gui
xxxs://ibb.co/fxbc8zf)
OBS-Version
xxxs://ibb.co/w0VXYgz)

greetings

greetings

Because is set to the built in theme. Switch to the System theme.

in kvantum i guess ?