Weebly for Education hasn't had any updates in a few years so it's not surprising that it is being closed down. I always liked the service and found it to be a good way for teachers to build their own websites. More importantly, it provided a good way for students to create their own websites that teachers could actively monitor. But all good things come to an end. Thanks for the good service for all the years, Weebly for Education.
Now that Weebly for Education is closing and Google has officially excluded Blogger from Google Workspace for Education (for those under 18), the only good blogging option for students that I can recommend now is Edublogs unless you want to go the route of self-hosting. And if you were using Weebly for Education for digital portfolios I'd recommend taking a look at Google Sites, Spaces, or Seesaw.