If your game version is too high and you need to change it, start the game, the lower right has the current version number (mine is 1.204.01 b2), exit game, open up Steam, Space Engineers properties, beta participation and choose the next lowest version number, wait for the game to download and install, and try again.

It might be this mod
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2519452277
It requires other mods that are listed as broken.

HI, it's probably a Modded World saved on the Workshop and that is very cool because all Mods will be downloaded and installed automatically on loading that World save.

Just have to Download the World to have it in your Load game menu to go to its setting to see all the Mods added to it and be able to test all those Mods one at a time to know if they are all compatible with the new game version we have today.


Thats said, ShadedMJ shared one World having Modded planets and just make sure all those Planet Mods are compatible.
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Report to the Mod authors so they can fix/ipdate their Mods ASAP, well if the Mods added to the world are not working,

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I see the auhor posted a comment saying his world save is broken

g.wes [author] 18 Jun, 2022 @ 4:25am
Extrenix yes my world and broken for the moment

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2519452277

That comment was posted in 2022 so he may have to fix/update again and best to contact him.