Are you able to connect with the Android Browser (different from Chrome?)? Are you able to check your emails with the Email or Gmail apps? If the answer is no to all these questions, it may be that you haven't previously connected to a Wifi hotspot?
Thank you for your help. Indeed, I am connected to a wifi hotspot. I haven't tried an ANDROID browser. What I don't understand is that at first, it worked, but now it no longer works. Thanks again.