All the menu bars have disappeared, also all the titlebars and frames have disappeared.
Tried adding new menu bars but no good came out of that.
Output of neofetch:
OS : Manjaro Linux x86_64
Host : Latitude 3490
Kernel : 5.4.85-1-MANJARO
Uptime : 44 mins
Packages : 1397 (pacman)
Shell : zsh 5.8
Resolution : 1366x768
DE : Plasma 5.20.4
WM : KWin
WM Theme : Sweet-Mars-transparent
Theme : Layan [Plasma], Sweet-mars [GTK2/3]
Icons : candy-icons [Plasma], candy-icons [GTK2/3]
Terminal : konsole
Terminal Font : MesloLGS Nerd Font Mono 10
CPU : Intel i5-8250U (8) @ 3.400GHz
GPU : Intel UHD Graphics 620
Memory : 2492MiB / 7858MiB