Tech support told me to address my issue here.

Case #: 21118810

When I try to compose an email and I start typing the forst few letters of the contact, nothing comes up.... it does not auto populate from my contact list. When I look at my contacts, they are all there. When I try to search my contacts, a message appears: "No Matching Contacts Found".
I need help with this immediately. I cannot write emails if I can't find my contacts.