I failed to publish this blog in the morning. I received a message I did not understand about failures to deploy. At first it was a message about a missing deploy key. Thus, I blindly added a deploy key. The next failure was related to multiple artifacts named github-pages. After several attempts to rebuild the pages, I found some else had a similar problem. I followed the advice, unpublished my blog, tried to build it again, but no success. FInally, I realized that my _config.yml included the line version: v1.2.0. In my laptop I’m running version 4.3.1, so I replaced that line by version: v4.3.1, pushed the change and the blog came alive again. I don’t fully understand what has happened.