Lost contacts when switching from Catalina back to Mojave
I restored my MacbookPro back to Mojave after upgrading to Catalina on the advice of an Apple tech support assistant as a suggested fix for a problem in Preview. The fix didn't work, and I hated Catalina, so I switched back to Mojave and now my contacts are missing, although they show up at icloud.com. I didn't formerly sync my contacts to iCloud because I use an external hard drive backup with Time Machine. However, when I restored all my files via Time Machine, none of my Contacts reappeared. Please help.