my contact list vanished?

ok yesterday 9-4-2020 i went to compose an email and normally i type a letter and it fills with suggested emails. that failed and then i went to the contacts section and all my contacts are gone. and it will not even let me create one. i tried restoring my pc back a few weeks and that failed. i tried importing them from yahoo and that failed. i have some in gmail but do not use gmail much but with ll the issues i have had with yahoo lately i'm about ready to switch over to gmail. i tred switching back to basic and most of the contacts are there but also when i type a letter for the start of a contact the basic now will not fill in the rest. also the wife's pc is doing the same thing so it just is not me. any ideas how to get back the contacts list? thanks