Hmm…
So it’s not the cookies or cache. It’s not the plugins. It doesn’t work in Internet Explorer either, so it’s not a browser thing.
And I contacted Bluehost to ask for help, and they did not have any problems. In fact, the guy from Bluehost was able to publish and update posts and pages on my account from where he was sitting.
It’s becoming obvious that this could be a problem with my computer. Any ideas on what it could be, or how to fix it?