Hi! Booted my Manjaro 18 (Plasma 5.14.3, WM theme - Arc) recently just to find the theme is broken, there are no shadows, "blur" effect is gone, application dashboard is also black instead of transparent. Is it something wrong with KWin? I tried to search for solution, but didn't find anything...

Screenshots:
https://ibb.co/hLq9cJ1
https://ibb.co/pbwtzQS

If Alt+Shift+F12 does not help, check your OpenGL drivers. If you cannot get them working, you can switch KWin from OpenGL compositing to XRender compositing mode. This will restore the shadows and transparency, but not the blur.

Thank you, it helped!