Cannot run Zoom on MacBook Air 2020 Catalina 10.15.5

Hello, 

Can somebody help me?

Every time my guest logs in, Zoom blocks (freezes and disconnect)

I checkend already privacy settings (allowing camera, mic, screen recording ) and also put out the fire wall, but nothing helps

I can log in when someone else invites me

need Zoom for work, so need help. 

PS Teams runs well, so I don't think it is my computer hardware. 

I can also run Zoom on my Apple MacBook Pro (2015) without any problems

Thank you!