World not being saved

Hello, I have a problem. Everytime the server is closed it's kinda reset itself. My inventory is ok but chunks are not saved/stored/loaded/idk.

The problem is with chunks, I searched other threads but I don't know what to do. At first I thought that thanos file (I think that this is related to optimize option) was the problem, but even without it, the server resets itself and its chunks like I never played inside of it.

The log says stuff like "failed to read chunk" "couldn't read chunk" and "failed to store chunk" but even searching these infos online and in this forum I can't find any solutions. So I'm sharing you my log, please help me and thanks in advice.

Log:

Forge server log [#aGjBlcF] - mclo.gs

Quote from Roman

What is the address of the server in question?

Sorry, I forgot to mention that:
ghastietheghast.aternos.me

Quote from Roman

Did you upload the world?

Nope. I tried once with mods and it worked properly. After I disconnected it was ok, but when I played the day after it was like resetted. So I tried without mods, but I had the same problem. Actually I'm playing 1.17.1 without mods but I would like playing with mods, since this is the best feature of aternos.

No sir, as I said I had only a couple of mods installed.