[MC-240445] Minecraft Worlds aren't saving (Java)

I just made a world and when I went to go back to it, it was gone. It didn't save.

Comments 2

[Mod] Neko 2021-11-03T17:31:28Z

Thank you for your report!
However, this issue has been closed as a Incomplete.

Your report does not contain enough information. As such, we're unable to understand or reproduce the problem.
Please review the guidelines linked below before making further reports.

In case of a game crash, be sure to attach the crashlog from [minecraft/crash-reports/crash--client.txt|http://hopper.minecraft.net/help/guides/finding-minecraft-data-folder].

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Gallaer 2021-11-03T19:51:58Z

The Issues Guidelines link does not have anything on it and says the images on it do not exist. Also, what can I show you to see what is happening as the evidence is the worlds just not saving.