verify your twitter account on your profile on CoSo
open twitter and CoSo in the same browser in separate tabs
open your twitter & CoSo edit profiles and remove any your twitter URL if it's there and remove any URL on your twitter account then save both profiles refresh twitter tab then on CoSo leave the edit profile page and refresh the tab
cont....
if like me you have CoSo or twitter set to run as a PWA, progressive web app, via a browser you'll need to open both sites inside the actual browser not via the PWA
i'd recommend only doing on a PC/laptop i have only tried it via that method
this is what you should see here on CoSo for your twitter URL