After pulling watchOS 5.1 from its servers last week due to some devices were unable to boot after installation, Apple today released watchOS 5.1.1, which shouldn't suffer the same issues.
Watchos 5.1 RSS
A "small number" of Watch Series 4 users are reporting that their smartwatch has been bricked after updating to watchOS 5.1. The company has now pulled the update, with no fix announced as of yet.
Apple has released the fifth developer betas for iOS 12.1, tvOS 12.1, and watchOS 5.1 today, introducing no major feature additions except for a slew of improvements and bug fixes.
The fourth developer beta builds for iOS 12.1, watchOS 5.1, and tvOS 12.1 include only a few minor updates generally. The betas are now available from Apple's developer center or via OTA.
Apple today released the first betas for the first minor updates that follow this week's major updates. You can now test out iOS 12.1, watchOS 5.1, and tvOS 12.1- if you're a developer.