Unfortunatly, this solution is not working for me (and few other after looking to the forum).
(v1.0) pkg> update
Resolving package versions…
ERROR: Unsatisfiable requirements detected for package HTTPClient [0862f596]:
HTTPClient [0862f596] log:
├─HTTPClient [0862f596] has no known versions!
└─restricted to versions * by an explicit requirement — no versions left
I have removed the folder .git located into the .julia/registries/General and the error message has gone but … no update (may be because no packages have been changed). To be confirmed.