Before looking at solutions, start by ensuring that all the mods you intend to use are compatible with the version of Minecraft and Forge Mod Loader (FML) you have installed. If you have incompatible versions, the error is very likely to occur. Update Mods and Forge Like every other softwar...
just look for “World.fwl”, “World.db”, and their respective .old versions. Replace the current save with the old ones, and you should be able to restore your world from a the backup, if the “move to local” method does
If you’re good on that front, the next step is to make sure the files are okay on your end. If you’re playing Halo Infinite on Steam, you can right-click the game in your library to visit the Properties, and then click on Local files and click to Verify the integrity of the ga...