What could cause many errors in the registry?

[thomasd3]

The watchtower logs look fine:

But the registry logs show errors at every request:

Sorry for pictures, for some reason my terminal emulator (Warp) doesn't let me copy-paste from that session.

[piksel]

The normal authentication flow for docker registries actually start with a 401, where the client get a header telling what scope needs authenticated.

Ref: https://distribution.github.io/distribution/spec/auth/token/

If you want more details about what happens during an update, enable --debug.