Save world changes

Hello, I have loaded a world created by me on my server, but nothing I do in the world is loaded. When I restart or turn off the server everything stays as it was at the beginning and I only have what I have in inventory before leaving. I hope they can solve it because even creating another server it keeps giving me the same failure. Thank you

Hello,

I have loaded a world created by me on my server, but nothing I do in the world is loaded. When I restart or turn off the server everything stays as it was at the beginning and I only have what I have in inventory before leaving. I hope they can solve it because even creating another server it keeps giving me the same failure. Thank you

Yes, that happens to me