what plugin(s) are you using for those widgets?
have you checked if those plugins need updating as well?
I was actually working with my widgets screen in my Admin account this morning and after I added the 125×125 banner widget I flipped over to my site to verify I liked the look. When I returned to my widgets page it no longer worked. All of my other screens in my admin account work perfectly fine; it is only the widgets screen, totally unresponsive, no access to the “screen options” or “Help” drop downs and when I go to “manage in customizer” option and click on widgets, even though I can see them, I get a message that there aren’t any. This is bad since my site, although new, is live and I need to modify my widgets. HELP!.