Screen sharing issues during a hybrid meeting

I noticed since the last software update of Zoom (early Sept 2021), Zoom sharing has not been working properly.  I've been doing hybrid meetings since June 2021 and had no issues until the past two meetings starting Sept. 14, 2021.  Issues are:  1) Zoom attendees cannot see my Powerpoint slides during screen share.  It works for about 2 slides and then freezes.  2)  I cannot have my external video camera on while I am screen sharing, otherwise no slides get shown during the screen share.  What is the fix for this?