auto unlock with Apple Watch not working
when I try to 'check' the unlock Mac with watch option in sysprefs, keep getting message to 'login to iCloud on watch app on iPhone'. BUT I'm signed in to icloud on iPhone, and on Apple Watch and all my other devices.
MacBook Pro (15-inch, Late 2016), macOS High Sierra (10.13.4), Time Capsule 1 TB (1st Generation)