(its not an error from 1.17, sorry) hi i have a problem with my minecraft worlds and i wanted to see if you guys could help me. A few days ago I opened minecraft as usual and I got an error: "error updating the native minecraft launcher" so I looked for a solution on the internet, in the end I came to the conclusion that I should reinstall minecraft from scratch.

so I deleted the "minecraft launcher" folder, and the .minecraft folder, obviously I made a backup copy of the .minecraft folder in google drive, before deleting it so as not to lose my worlds. reinstall Minecraft, and everything worked. I remember putting my Minecraft worlds in the "save" folder and then starting to download the versions I needed to open those worlds (1.16, 1.12, 1.13, etc.). When I opened my first world in Forge 1.12.2, for some reason my inventory still had everything, it was in the same seed and the same coordinate, but all my builds / mods to the world, they were gone, it was like restarting the world, I tried other worlds of the same version and the same thing happened. Then I remembered that when downloading the versions, I didn't download the exact version of forge that I had, you see, I had that world in Forge 1.12.2 14.23.5.2854, and when I downloaded the versions, I downloaded Forge 1.12. 2 14.23.5.2855, which may have something to do with it, then I tried to completely replace the .minecraft folder, it didn't work, then I tried worlds from another version (1.16.5 official), one of them worked, which was one that had been downloaded some time ago from "planet minecraft", I had the complete map, and everything that I had destroyed / built, but, another world of the same version, did not work, that is, I had all the inventory, but nothing of what had built in the world had appeared.

In summary:

-the worlds that I created in the past, have that error that I mentioned. -Some worlds I downloaded in the past work perfectly.

theories:

-It may have something to do with the forge versions that do not match (I don't think so, because if that were the case, nothing would have happened with other worlds from other versions)

-Maybe it has something to do with the fact that if the worlds They are created by me or I download them.

-It may be that when I saved the worlds on Google Drive, they somehow got corrupted.

Sorry for the bad English, I'm using google translate because I don't know much to talk. Please help me, I am so sorry to lose those worlds that I worked so hard on for a long time. my best wishes. for the whole mojang team.