Cannot get rightside toolbar in Yahoo mail since updating Apple OS.

HenryRol Posts 3 Registration date Monday June 22, 2020 Status Member Last seen October 8, 2021 - Oct 8, 2021 at 07:50 PM

I was getting the rightside toolbar in yahoo mail.
Yesterday I downloaded an update to the Apple IMac OS Big Sur OS,
and to Safari. Now I cannot get the rightside scrollbar in Yahoo mail.
(I still get the leftside toolbar).
(Apple was not able to help me, and told me to contact Yahoo.)
I was able to get the rightside scrollbar in Yahoo mail before downloading the Apple updates.
I am still able to get rightside scrollbars when in other websites, but not Yahoo mail.
System Configuration: Macintosh / Safari 15.0