I installed 14.0.1.1 and launched it.
It copied my config\14.0.0 to a new config\14.0.1 folder.
A Slick-C stack appeared in the background -- see attached (it is too large to paste in the message).
With the Slick-C stack in the background, next it prompted me about symbol highlighting.
I checked the box to highlight undefined symbols, and I clicked the button to continue using symbol coloring.
Next it prompted "Invalid object handle \n file=MenuCustomizationHandler.ex offset=4172 \n [OK]".
I can reproduce this consistently by deleting the config\14.0.1 folder and launch VS again.
If I've made any changes to the default menus in the past, it has only been one or two menu items (if even that).