Hi, here is an attempt to fix it: https://framadrop.org/r/Ow4Xg909c4#1PRrWInaRR24oDG0egaTHu0mN/n2SphNyNFZGGWukUI=
Can you try it and tell me if it solves the problem for the palette window or for all windows or for none?
If none, you can try to press f12 with the focus on the main window (the one with the menus) and see if there are any error messages in the console....