I can’t get to my contacts to send or reply to an email. My cache is emptied, my browser is up to date and I have https set up. What else can I do?

When I try to reply, instead of automatically entering the contact email address, a little green circle spins and spins. When trying to send an email, I will type in the first few letters of the recipient's name and instead of it automatically bringing up my contacts, the same green circle spins.