We have now identified the issue. With the latest of Atom.jl, Registrator introduced wrong bounds in the Compat.toml file in the registry. The problem is isolated to the version of Registrator running on JuliaHub so relatively few packages should be affected. We have now fixed the issue in the JuliaPro registry so you should be able to resolve the issue locally by updating your packages.
We are currently working of fixing the General registry for all affected packages.