Black Boxes over Zoom controlS and participant tiles when sharing

Hello,
I am an adjunct instructor who teaches remotely. Unfortunately, when I share my screen with my class (which is the vast majority of the time), the participants see a black box where the Zoom controls and participant tiles appear on my screen.
In an attempt to fix the problem, I tried sharing the screen with both the video optimizer on and off. This did not fix it. I also updated all of the drivers on my laptop. This did not work. Moreover, in my research, many people mentioned that this problem was specific to Lenovo laptops, but I have an HP laptop.
Could you provide some guidance on resolving this issue?
Thank you in advance,
Josh Bowman
ACLI ESL Adjunct Faculty
NOVA Workforce (Online)