The window to sell is in background just adjust the layer

Try test with /wtdebug on
There is no additional overlay in my game.

Hello windtools + paste addon is causing this on my ui. Check if you have same addons

Hello windtools + paste addon is causing this on my ui. Check if you have same addons

I can confirm this. Paste is also causing issues with the shadow frame levels, probably due to the libraries included being ancient. If you enjoy Paste, there's an updated version called Paste NG.