Server's world is corrupted

I have tried already a few times to open a server to play with a few friends but the world is always severely corrupted. I don't know what or why it happens. Just to clarify, it has mods (69 mods, specifically. The most of them are small but are a few bigs like ad astra, bettere…

I have tried already a few times to open a server to play with a few friends but the world is always severely corrupted. I don't know what or why it happens. Just to clarify, it has mods (69 mods, specifically. The most of them are small but are a few bigs like ad astra, betterend, fossils and archeology). When I create a new world in singleplayer this doesn't happen. https://imgur.com/a/b8F9tCJ https://imgur.com/a/TRJNKP3

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