Adding contact on a mac

Hi, I have a problem when I try to add a contact on my Mac on zoom.

Whenever I try to add a contact on my mac, I go to the "contacts" button, but there is no plus button for me to enter the email of the contact. I use my laptop for school so I need contacts so this is not very good for me.  There is no error because I even asked "Bolt" how to add a contact on a MacBook and he said to click "contacts", and then click The plus button to enter the email.   
This is not very good as I even asked your assistant software and she said to do something I cannot. Is anything similar for anyone else?? also, I have the same problem with going to the chat section because there is no button!!

thanks,

Kavya.